tag:blogger.com,1999:blog-23773457948316324812023-11-15T22:18:26.997-08:00Toan thptUnknownnoreply@blogger.comBlogger26125tag:blogger.com,1999:blog-2377345794831632481.post-81684949098265279012014-11-26T00:15:00.000-08:002014-11-26T00:15:20.528-08:00giải toán đại số bằng phương pháp nhân lượng liên hợp<iframe width="420" height="315" src="//www.youtube.com/embed/U9LjknS4VAI" frameborder="0" allowfullscreen></iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-48591231127049494352014-11-25T20:19:00.000-08:002014-11-25T20:19:43.454-08:00đại số bài 2 - thầy nguyễn tiến chinh<iframe width="420" height="315" src="//www.youtube.com/embed/_HkPBKmEMc4" frameborder="0" allowfullscreen></iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-81837873988580340882014-11-25T20:17:00.000-08:002014-11-25T20:17:01.617-08:00video đại số - bài 1 - thầy nguyễn tiến chinh<iframe width="420" height="315" src="//www.youtube.com/embed/ay-zUUCmloM" frameborder="0" allowfullscreen></iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-85724292096841309852014-11-25T20:05:00.000-08:002014-11-25T20:05:10.995-08:00bài giảng đại số thầy chinh<div id="fb-root"></div> <script>(function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/vi_VN/all.js#xfbml=1"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk'));</script>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-61954417450489852162012-07-13T23:13:00.001-07:002012-07-13T23:13:56.074-07:00<h1 class="entry-title" style="color: #333333; font-family: Arial, serif; font-size: 22px; line-height: 1.25; margin: 0px 0px 10px; padding: 0px;">
Đáp án, Lời giải Đề thi Đại học môn Toán khối D năm 2012</h1>
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<span class="meta-author">Posted by VNMATH.COM</span> <span class="meta-date">on 13:30</span> <span class="meta-cat">in <a href="http://www.vnmath.com/search/label/Luy%E1%BB%87n%20thi%20%C4%90%E1%BA%A1i%20h%E1%BB%8Dc" rel="tag" style="color: #666666; text-decoration: none;">Luyện thi Đại học</a>, <a href="http://www.vnmath.com/search/label/%C4%90%E1%BB%81%20thi%20-%20%C4%90%C3%A1p%20%C3%A1n" rel="tag" style="color: #666666; text-decoration: none;">Đề thi - Đáp án</a>, <a href="http://www.vnmath.com/search/label/%C4%90%E1%BB%81%20thi%20%C4%90%E1%BA%A1i%20h%E1%BB%8Dc" rel="tag" style="color: #666666; text-decoration: none;">Đề thi Đại học</a>, <a href="http://www.vnmath.com/search/label/%C4%90%E1%BB%81%20thi%20%C4%90%E1%BA%A1i%20h%E1%BB%8Dc%202012" rel="tag" style="color: #666666; text-decoration: none;">Đề thi Đại học 2012</a> </span><span class="meta-sep" style="color: #999999; margin: 0px 3px;">|</span> <span class="meta-comments">0 comments </span><div id="___plusone_1" style="background-color: transparent; border-style: none; display: inline-block; float: none; font-size: 1px; height: 24px; line-height: normal; margin: 0px; padding: 0px; vertical-align: baseline; width: 106px;">
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Đã có Đáp án đề thi môn Toán Học khối D năm 2012: <a href="http://books.vnmath.com/2012/07/dap-de-thi-mon-toan-dai-hoc-khoi-d-nam.html" style="color: #004276; text-decoration: none;" target="_blank">Xem Dap an de thi mon Toan khoi D nam2012.</a></h2>
Gợi ý giải của TT Vĩnh Viễn<br /><a href="http://www.scribd.com/doc/99590137/goiybaigiai-monToan-khoiD-2012" style="color: #004276; display: block; font-family: Helvetica, Arial, sans-serif; font-size: 14px; line-height: normal; margin: 12px auto 6px;" title="View goiybaigiai-monToan-khoiD-2012 on Scribd">goiybaigiai-monToan-khoiD-2012</a><iframe class="scribd_iframe_embed" data-aspect-ratio="0.706697459584296" data-auto-height="true" frameborder="0" height="600" id="doc_94608" scrolling="no" src="http://www.scribd.com/embeds/99590137/content?start_page=1&view_mode=list&access_key=key-18ltykcco7jtw56nm87e" width="100%"></iframe><br /><b>Đề thi đại học môn Toán khối D năm 2012 :</b><br /><span style="font-size: small;"><br /></span><br /><span style="font-size: small;"><b>I. PHẦN CHUNG CHO TẤT CẢ THÍ SINH (7,0 điểm)</b></span><br /><br /><b>Câu 1 (2,0 điểm).</b> Cho hàm số <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-1-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-1" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 16.173em;"><span style="border: 0px; clip: rect(1.214em 1000em 2.893em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.296em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-2" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-3" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-4" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-5" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.398em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.49em;"><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.52em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -2.599em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-6" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.374em -0.526em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -1.777em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-7" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.49em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msubsup" id="MathJax-Span-8" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-9" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-10" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-11" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mi" id="MathJax-Span-12" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">m</span><span class="msubsup" id="MathJax-Span-13" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-14" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-15" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-16" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-17" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mfenced" id="MathJax-Span-18" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-28" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size1; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mrow" id="MathJax-Span-20" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-21" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span class="msubsup" id="MathJax-Span-22" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.31em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-23" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">m</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.864em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-24" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-25" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-26" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">1</span></span><span class="mo" id="MathJax-Span-29" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size1; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mi" id="MathJax-Span-30" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-31" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-32" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.342em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.49em;"><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.52em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -2.599em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-33" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.374em -0.526em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -1.777em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-34" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.49em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mspace" id="MathJax-Span-35" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mspace" id="MathJax-Span-36" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mfenced" id="MathJax-Span-37" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-38" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mn" id="MathJax-Span-39" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-40" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 2.296em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.933em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.639em; width: 0px;"></span></span></nobr></span>, với <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-2-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-41" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.864em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-42" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-43" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">m</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.778em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.098em; width: 0px;"></span></span></nobr></span> là tham số thực.<br /><b>a)</b> Khảo sát sự biến thiên và vẽ đồ thị hàm số <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-3-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-44" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.235em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-45" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-46" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span><span class="mn" id="MathJax-Span-47" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-48" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span> khi <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-4-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-49" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.593em;"><span style="border: 0px; clip: rect(1.322em 1000em 2.369em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-50" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-51" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">m</span><span class="mo" id="MathJax-Span-52" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-53" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">1</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.081em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.098em; width: 0px;"></span></span></nobr></span>.<br /><b>b)</b> Tìm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-5-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-54" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.864em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-55" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-56" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">m</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.778em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.098em; width: 0px;"></span></span></nobr></span> để hàm số <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-6-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-57" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.235em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-58" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-59" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span><span class="mn" id="MathJax-Span-60" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-61" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span> có hai điểm cực trị <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-7-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-62" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(3.373em 1000em 4.335em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -4em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-63" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-64" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-65" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-66" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 4em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.966em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.286em; width: 0px;"></span></span></nobr></span> và <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-8-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-67" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(3.373em 1000em 4.335em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -4em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-68" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-69" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-70" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-71" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 4em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.966em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.286em; width: 0px;"></span></span></nobr></span> sao cho <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-9-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-72" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 9.136em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-73" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-74" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-75" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-76" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msubsup" id="MathJax-Span-77" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-78" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-79" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-80" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-81" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mfenced" id="MathJax-Span-82" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-83" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mrow" id="MathJax-Span-84" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-85" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-86" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-87" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-88" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="msubsup" id="MathJax-Span-89" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-90" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.023em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-91" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span class="mo" id="MathJax-Span-92" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mo" id="MathJax-Span-93" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-94" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">1</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 2 (1,0 điểm).</b> Giải phương trình <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-10-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-95" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 17.099em;"><span style="border: 0px; clip: rect(1.143em 1000em 2.523em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-96" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-97" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">sin</span><span class="mo" id="MathJax-Span-98" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mn" id="MathJax-Span-99" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-100" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-101" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-102" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">cos</span><span class="mo" id="MathJax-Span-103" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mn" id="MathJax-Span-104" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-105" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-106" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mi" id="MathJax-Span-107" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">sin</span><span class="mo" id="MathJax-Span-108" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mi" id="MathJax-Span-109" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-110" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-111" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">cos</span><span class="mo" id="MathJax-Span-112" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mi" id="MathJax-Span-113" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-114" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="msqrt" id="MathJax-Span-115" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.296em;"><span style="border: 0px; clip: rect(1.322em 1000em 2.358em -0.506em); left: 0.802em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-116" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-117" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0.802em; margin: 0px; padding: 0px; position: absolute; top: -1.844em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.494em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(3.015em 1000em 4.385em -0.484em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -4.035em; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">√</span><span style="border: 0px; display: inline-block; height: 4em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mi" id="MathJax-Span-118" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">cos</span><span class="mo" id="MathJax-Span-119" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mn" id="MathJax-Span-120" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-121" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.529em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.306em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 3 (1,0 điểm).</b> Giải hệ phương trình <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-11-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-122" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 19.877em;"><span style="border: 0px; clip: rect(2.028em 1000em 5.398em -0.412em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -3.963em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-123" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-124" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-194" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size4; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">{</span></span><span class="mtable" id="MathJax-Span-127" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.1667em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 14.259em;"><span style="border: 0px; clip: rect(2.477em 1000em 5.157em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -4em; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 14.259em;"><span style="border: 0px; clip: rect(1.322em 1000em 2.563em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.845em; vertical-align: 0px;"><span class="mtd" id="MathJax-Span-128" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-129" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-130" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-131" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-132" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-133" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-134" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-135" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-136" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-137" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.154em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.406em; vertical-align: 0px;"><span class="mtd" id="MathJax-Span-138" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-139" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-140" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="texatom" id="MathJax-Span-141" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-142" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-143" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-144" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-145" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-146" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="texatom" id="MathJax-Span-147" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-148" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-149" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-150" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-151" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mi" id="MathJax-Span-152" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-153" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="texatom" id="MathJax-Span-154" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-155" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-156" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-157" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-158" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-159" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="texatom" id="MathJax-Span-160" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-161" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-162" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.991em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.563em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-163" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.546em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-164" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-165" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-166" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-167" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-168" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-169" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mi" id="MathJax-Span-170" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-171" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-172" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border: 0px; display: inline-block; height: 4em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span class="mspace" id="MathJax-Span-174" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mspace" id="MathJax-Span-175" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mspace" id="MathJax-Span-176" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mspace" id="MathJax-Span-177" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mfenced" id="MathJax-Span-178" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-195" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mrow" id="MathJax-Span-180" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-181" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-182" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-183" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-184" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">,</span><span class="mi" id="MathJax-Span-185" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span></span></span><span class="mo" id="MathJax-Span-186" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">∈</span><span class="texatom" id="MathJax-Span-187" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-188" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-189" style="border: 0px; display: inline; font-family: MathJax_AMS; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">R</span></span></span></span><span class="mo" id="MathJax-Span-196" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 3.963em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 4.215em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -1.77em; width: 0px;"></span></span></nobr></span><br /><br /><b>Câu 4 (1,0 điểm).</b> Tính tích phân <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-12-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-197" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 9.198em;"><span style="border: 0px; clip: rect(-0.495em 1000em 3.972em -0.53em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-198" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mstyle" id="MathJax-Span-199" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-200" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-201" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">I<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.064em;"></span></span><span class="mo" id="MathJax-Span-202" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="munderover" id="MathJax-Span-203" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.074em;"><span style="border: 0px; clip: rect(1.676em 1000em 4.268em -0.501em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -3.222em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-204" style="border: 0px; display: inline; font-family: MathJax_Size2; margin: 0px; padding: 0px; position: static; vertical-align: 0.001em;">∫<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.388em;"></span></span><span style="border: 0px; display: inline-block; height: 3.222em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.474em -0.528em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -0.674em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-205" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">0</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(3.141em 1000em 4.523em -0.436em); left: 0.406em; margin: 0px; padding: 0px; position: absolute; top: -5.81em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-206" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-207" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mfrac" id="MathJax-Span-208" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.429em;"><span style="border: 0px; clip: rect(1.772em 1000em 2.364em -0.546em); left: 50%; margin: 0px 0px 0px -0.154em; padding: 0px; position: absolute; top: -2.531em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-209" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 8px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">π<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.002em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.649em 1000em 2.358em -0.542em); left: 50%; margin: 0px 0px 0px -0.123em; padding: 0px; position: absolute; top: -1.835em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-210" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 8px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">4</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.224em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.429em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 4em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="texatom" id="MathJax-Span-211" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-212" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-213" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mfenced" id="MathJax-Span-214" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-215" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-216" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-217" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-218" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-219" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-220" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">sin</span><span class="mo" id="MathJax-Span-221" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"></span><span class="mn" id="MathJax-Span-222" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-223" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span></span></span><span class="mo" id="MathJax-Span-224" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mi" id="MathJax-Span-225" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">d<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-226" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 5.698em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -2.262em; width: 0px;"></span></span></nobr></span><br /><br /><b>Câu 5 (1,0 điểm).</b> Cho hình hộp đứng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-13-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-227" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 7.346em;"><span style="border: 0px; clip: rect(1.149em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-228" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-229" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-230" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mi" id="MathJax-Span-231" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="mi" id="MathJax-Span-232" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span><span class="mo" id="MathJax-Span-233" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">.</span><span class="msup" id="MathJax-Span-234" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-235" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.741em; margin: 0px; padding: 0px; position: absolute; top: -2.616em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-236" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msup" id="MathJax-Span-237" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-238" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.741em; margin: 0px; padding: 0px; position: absolute; top: -2.583em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-239" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msup" id="MathJax-Span-240" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.003em;"><span style="border: 0px; clip: rect(1.283em 1000em 2.38em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-241" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.743em; margin: 0px; padding: 0px; position: absolute; top: -2.605em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-242" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msup" id="MathJax-Span-243" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.063em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-244" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.802em; margin: 0px; padding: 0px; position: absolute; top: -2.583em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-245" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.329em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span> có đáy là hình vuông, tam giác <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-14-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-246" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.407em;"><span style="border: 0px; clip: rect(1.149em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-247" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msup" id="MathJax-Span-248" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-249" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.741em; margin: 0px; padding: 0px; position: absolute; top: -2.616em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-250" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mi" id="MathJax-Span-251" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-252" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.329em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span> vuông cân, <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-15-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-253" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.395em;"><span style="border: 0px; clip: rect(1.149em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-254" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msup" id="MathJax-Span-255" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-256" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.741em; margin: 0px; padding: 0px; position: absolute; top: -2.616em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-257" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mi" id="MathJax-Span-258" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="mo" id="MathJax-Span-259" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-260" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">a</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.329em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span>. Tính thể tích của khối tứ diện <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-16-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-261" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.457em;"><span style="border: 0px; clip: rect(1.16em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-262" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-263" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-264" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="msup" id="MathJax-Span-265" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-266" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.741em; margin: 0px; padding: 0px; position: absolute; top: -2.583em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-267" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="msup" id="MathJax-Span-268" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.003em;"><span style="border: 0px; clip: rect(1.283em 1000em 2.38em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-269" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.743em; margin: 0px; padding: 0px; position: absolute; top: -2.605em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-270" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.314em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span> và khoảng cách từ điểm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-17-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-271" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.741em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-272" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-273" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.133em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> đến mặt phẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-18-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-274" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.333em;"><span style="border: 0px; clip: rect(1.262em 1000em 2.831em -0.404em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.296em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-275" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-276" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-277" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size1; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-278" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-279" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-280" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mi" id="MathJax-Span-281" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="msup" id="MathJax-Span-282" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.063em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-283" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.802em; margin: 0px; padding: 0px; position: absolute; top: -2.583em; vertical-align: 0px;"><span class="mo" id="MathJax-Span-284" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">′</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-285" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size1; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 2.296em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.785em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.555em; width: 0px;"></span></span></nobr></span> theo <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-19-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-286" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.494em;"><span style="border: 0px; clip: rect(1.547em 1000em 2.368em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-287" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-288" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">a</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.776em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.097em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 6 (1,0 điểm).</b> Cho các số thực <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-20-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-289" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.42em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.563em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-290" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-291" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-292" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">,</span><span class="mi" id="MathJax-Span-293" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.04em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span> thỏa mãn <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-21-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-294" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 12.593em;"><span style="border: 0px; clip: rect(1.04em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-295" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-296" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-297" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-298" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.347em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-299" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-300" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-301" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-302" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-303" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-304" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-305" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">4</span></span></span><span class="mo" id="MathJax-Span-306" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 2.901em; margin: 0px; padding: 0px; position: absolute; top: -2.65em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-307" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-308" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="texatom" id="MathJax-Span-309" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-310" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-311" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.285em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-312" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-313" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-314" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-315" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-316" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-317" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-318" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">4</span></span></span><span class="mo" id="MathJax-Span-319" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 2.84em; margin: 0px; padding: 0px; position: absolute; top: -2.65em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-320" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-321" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-322" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-323" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-324" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-325" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">≤</span><span class="mn" id="MathJax-Span-326" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">32</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.784em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span>. Tìm giá trị nhỏ nhất của biểu thức <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-22-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-327" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 14.568em;"><span style="border: 0px; clip: rect(1.155em 1000em 2.608em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-328" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-329" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mo" id="MathJax-Span-330" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="texatom" id="MathJax-Span-331" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-332" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-333" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.001em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-334" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.556em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-335" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-336" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="texatom" id="MathJax-Span-337" style="border: 0px; display: inline; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-338" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-339" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.991em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.563em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-340" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; left: 0.546em; margin: 0px; padding: 0px; position: absolute; top: -2.536em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-341" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span></span><span class="mo" id="MathJax-Span-342" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-343" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">3</span><span class="mfenced" id="MathJax-Span-344" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-345" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-346" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-347" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-348" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-349" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-350" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-351" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">1</span></span></span><span class="mo" id="MathJax-Span-352" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mfenced" id="MathJax-Span-353" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-354" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-355" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-356" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-357" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-358" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-359" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-360" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-361" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span></span></span><span class="mo" id="MathJax-Span-362" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.629em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span><br /><br /><b><span style="font-size: small;">II. PHẦN RIÊNG (3,0 điểm): Thí sinh chỉ được làm một trong hai phần (phần A hoặc phần B).</span></b><br /><br /><b>A. Theo chương trình Chuẩn</b><br /><br /><b>Câu 7.a (1,0 điểm).</b> Trong mặt phẳng với hệ tọa độ <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-23-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-363" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.79em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-364" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-365" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-366" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-367" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.394em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>, cho hình chữ nhật <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-24-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-368" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.963em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-369" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-370" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-371" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mi" id="MathJax-Span-372" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="mi" id="MathJax-Span-373" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.163em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span>. Các đường thẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-25-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-374" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.42em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-375" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-376" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-377" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.163em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span>và <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-26-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-378" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.543em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-379" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-380" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-381" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.133em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> lần lượt có phương trình là <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-27-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-382" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 4.383em;"><span style="border: 0px; clip: rect(1.322em 1000em 2.563em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-383" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-384" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-385" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-386" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">3</span><span class="mi" id="MathJax-Span-387" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-388" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-389" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.343em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span> và <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-28-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-390" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 5.494em;"><span style="border: 0px; clip: rect(1.311em 1000em 2.563em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-391" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-392" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-393" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mi" id="MathJax-Span-394" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-395" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-396" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">4</span><span class="mo" id="MathJax-Span-397" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-398" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.357em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>; đường thẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-29-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-399" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.543em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-400" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-401" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mi" id="MathJax-Span-402" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> đi qua điểm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-30-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-403" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 4.753em;"><span style="border: 0px; clip: rect(1.888em 1000em 4.057em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -3.222em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-404" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-405" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">M<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.081em;"></span></span><span class="mfenced" id="MathJax-Span-406" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-407" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size2; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mrow" id="MathJax-Span-408" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-409" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">−</span><span class="mfrac" id="MathJax-Span-410" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.287em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.49em;"><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.497em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -2.599em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-411" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.374em -0.526em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -1.777em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-412" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">3</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.49em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-413" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">;</span><span class="mn" id="MathJax-Span-414" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">1</span></span><span class="mo" id="MathJax-Span-415" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0em;"><span style="border: 0px; font-family: MathJax_Size2; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 3.222em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 2.595em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.96em; width: 0px;"></span></span></nobr></span>. Tìm tọa độ các đỉnh của hình chữ nhật <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-31-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-416" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.963em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-417" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-418" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-419" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mi" id="MathJax-Span-420" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="mi" id="MathJax-Span-421" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.163em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 8.a (1,0 điểm)</b> Trong không gian với hệ tọa độ <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-32-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-422" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.222em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-423" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-424" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-425" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-426" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mi" id="MathJax-Span-427" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.394em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>, cho mặt phẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-33-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-428" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 10.679em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-429" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-430" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-431" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mi" id="MathJax-Span-432" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">P<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.109em;"></span></span><span class="mo" id="MathJax-Span-433" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mo" id="MathJax-Span-434" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">:</span><span class="mn" id="MathJax-Span-435" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-436" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-437" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-438" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-439" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-440" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-441" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-442" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-443" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">10</span><span class="mo" id="MathJax-Span-444" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-445" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span> và điểm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-34-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-446" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 3.457em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.53em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-447" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-448" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">I<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.064em;"></span></span><span class="mfenced" id="MathJax-Span-449" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-450" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="mrow" id="MathJax-Span-451" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-452" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-453" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mn" id="MathJax-Span-454" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-455" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mn" id="MathJax-Span-456" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">3</span></span><span class="mo" id="MathJax-Span-457" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span>. Viết phương trình mặt cầu tâm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-35-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-458" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.494em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.53em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-459" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-460" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">I<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.064em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> và cắt <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-36-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-461" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.42em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-462" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-463" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span><span class="mi" id="MathJax-Span-464" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">P<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.109em;"></span></span><span class="mo" id="MathJax-Span-465" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span> theo một đường tròn có bán kính bằng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-37-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-466" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.494em;"><span style="border: 0px; clip: rect(1.311em 1000em 2.358em -0.528em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-467" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-468" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">4</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.081em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 9.a (1,0 điểm).</b> Cho số phức <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-38-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-469" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.432em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-470" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-471" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 0.778em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.098em; width: 0px;"></span></span></nobr></span> thỏa mãn <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-39-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-472" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 10.741em;"><span style="border: 0px; clip: rect(0.714em 1000em 2.813em -0.462em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-473" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mfenced" id="MathJax-Span-474" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-475" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-476" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-477" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-478" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-479" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-480" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">i</span></span></span><span class="mo" id="MathJax-Span-481" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mi" id="MathJax-Span-482" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-483" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mfrac" id="MathJax-Span-484" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.342em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.651em;"><span style="border: 0px; clip: rect(1.375em 1000em 2.594em -0.52em); left: 50%; margin: 0px 0px 0px -1.265em; padding: 0px; position: absolute; top: -2.834em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-485" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-486" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-487" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="mfenced" id="MathJax-Span-488" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-489" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0.073em;"><span style="border: 0px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Size1; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span></span><span class="texatom" id="MathJax-Span-490" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-491" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-492" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-493" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-494" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-495" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 11px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">i</span></span></span><span class="mo" id="MathJax-Span-496" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0.073em;"><span style="border: 0px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Size1; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 2.235em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.416em -0.497em); left: 50%; margin: 0px 0px 0px -0.586em; padding: 0px; position: absolute; top: -1.776em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-497" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-498" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-499" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-500" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-501" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 11px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">i</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 2.651em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-502" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-503" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">7</span><span class="mo" id="MathJax-Span-504" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-505" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">8</span><span class="mi" id="MathJax-Span-506" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">i</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 2.5em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.697em; width: 0px;"></span></span></nobr></span>. Tìm môđun của số phức <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-40-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-507" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 5.432em;"><span style="border: 0px; clip: rect(1.322em 1000em 2.44em -0.535em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-508" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-509" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">w</span><span class="mo" id="MathJax-Span-510" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-511" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-512" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-513" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-514" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mi" id="MathJax-Span-515" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">i</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.176em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.194em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>B. Theo chương trình Nâng cao</b><br /><br /><b>Câu 7.b (1,0 điểm).</b> Trong mặt phẳng với hệ tọa độ <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-41-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-516" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.79em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-517" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-518" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-519" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-520" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.394em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>, cho đường thẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-42-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-521" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 7.222em;"><span style="border: 0px; clip: rect(1.294em 1000em 2.563em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-522" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-523" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">d<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-524" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">:</span><span class="mn" id="MathJax-Span-525" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">2</span><span class="mi" id="MathJax-Span-526" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-527" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">−</span><span class="mi" id="MathJax-Span-528" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mo" id="MathJax-Span-529" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-530" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.222em; position: static; vertical-align: 0px;">3</span><span class="mo" id="MathJax-Span-531" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-532" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">0</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.38em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>. Viết phương trình đường tròn có tâm thuộc <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-43-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-533" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.494em;"><span style="border: 0px; clip: rect(1.294em 1000em 2.368em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-534" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-535" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">d<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.117em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.097em; width: 0px;"></span></span></nobr></span>, cắt <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-44-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-536" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.296em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.38em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-537" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-538" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-539" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.147em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span> tại <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-45-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-540" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.741em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-541" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-542" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.133em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> và <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-46-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-543" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.741em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-544" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-545" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span>. cắt <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-47-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-546" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.235em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-547" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-548" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-549" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.394em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span> tại <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-48-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-550" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.679em;"><span style="border: 0px; clip: rect(1.283em 1000em 2.38em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-551" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-552" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.148em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span> và <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-49-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-553" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.802em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-554" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-555" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> sao cho <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-50-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-556" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 5.926em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.38em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-557" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-558" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-559" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span><span class="mo" id="MathJax-Span-560" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mi" id="MathJax-Span-561" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">C<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.045em;"></span></span><span class="mi" id="MathJax-Span-562" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">D</span><span class="mo" id="MathJax-Span-563" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mn" id="MathJax-Span-564" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">2</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.163em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.113em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 8.b (1,0 điểm).</b> Trong không gian với hệ tọa độ <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-51-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-565" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.222em;"><span style="border: 0px; clip: rect(1.284em 1000em 2.563em -0.506em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-566" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-567" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">O</span><span class="mi" id="MathJax-Span-568" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mi" id="MathJax-Span-569" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.006em;"></span></span><span class="mi" id="MathJax-Span-570" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.394em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.36em; width: 0px;"></span></span></nobr></span>, cho đường thẳng <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-52-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-571" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 7.346em;"><span style="border: 0px; clip: rect(0.946em 1000em 2.755em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-572" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-573" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">d<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span class="mo" id="MathJax-Span-574" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">:</span><span class="mfrac" id="MathJax-Span-575" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.398em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.416em;"><span style="border: 0px; clip: rect(1.517em 1000em 2.366em -0.531em); left: 50%; margin: 0px 0px 0px -0.648em; padding: 0px; position: absolute; top: -2.606em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-576" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-577" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-578" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 11px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">x</span><span class="mo" id="MathJax-Span-579" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-580" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.52em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -1.776em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-581" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 1.416em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-582" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-583" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.398em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.355em;"><span style="border: 0px; clip: rect(1.517em 1000em 2.503em -0.541em); left: 50%; margin: 0px 0px 0px -0.617em; padding: 0px; position: absolute; top: -2.744em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-584" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-585" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-586" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 11px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">y<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.004em;"></span></span><span class="mo" id="MathJax-Span-587" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">+</span><span class="mn" id="MathJax-Span-588" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.496em); left: 50%; margin: 0px 0px 0px -0.463em; padding: 0px; position: absolute; top: -1.776em; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-589" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-590" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-591" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-592" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 1.355em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span><span class="mo" id="MathJax-Span-593" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.278em; position: static; vertical-align: 0px;">=</span><span class="mfrac" id="MathJax-Span-594" style="border: 0px; display: inline; margin: 0px; padding: 0px 0.12em 0px 0.398em; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.49em;"><span style="border: 0px; clip: rect(1.675em 1000em 2.366em -0.531em); left: 50%; margin: 0px 0px 0px -0.154em; padding: 0px; position: absolute; top: -2.606em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-595" style="border: 0px; display: inline; font-family: MathJax_Math; font-size: 11px; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.002em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(1.517em 1000em 2.358em -0.497em); left: 50%; margin: 0px 0px 0px -0.185em; padding: 0px; position: absolute; top: -1.776em; vertical-align: 0px;"><span class="mn" id="MathJax-Span-596" style="border: 0px; display: inline; font-family: MathJax_Main; font-size: 11px; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span><span style="border: 0px; clip: rect(0.815em 1000em 1.262em -0.556em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -1.297em; vertical-align: 0px;"><span style="border-left-style: solid; border-width: 0px 0px 0px 0.49em; display: inline-block; height: 1.25px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0px;"></span><span style="border: 0px; display: inline-block; height: 1.077em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 2.108em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.619em; width: 0px;"></span></span></nobr></span> và hai điểm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-53-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-597" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 9.506em;"><span style="border: 0px; clip: rect(1.238em 1000em 2.608em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-598" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-599" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mfenced" id="MathJax-Span-600" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-601" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-602" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-603" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-604" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-605" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mo" id="MathJax-Span-606" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-607" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-608" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mn" id="MathJax-Span-609" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">2</span></span></span><span class="mo" id="MathJax-Span-610" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span><span class="mo" id="MathJax-Span-611" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">,</span><span class="mspace" id="MathJax-Span-612" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mspace" id="MathJax-Span-613" style="border: 0px; display: inline-block; height: 0em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0em; width: 0.167em;"></span><span class="mi" id="MathJax-Span-614" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">B</span><span class="mfenced" id="MathJax-Span-615" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mo" id="MathJax-Span-616" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">(</span></span><span class="texatom" id="MathJax-Span-617" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-618" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mn" id="MathJax-Span-619" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">2</span><span class="mo" id="MathJax-Span-620" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mo" id="MathJax-Span-621" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">−</span><span class="mn" id="MathJax-Span-622" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">1</span><span class="mo" id="MathJax-Span-623" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">;</span><span class="mn" id="MathJax-Span-624" style="border: 0px; display: inline; font-family: MathJax_Main; margin: 0px; padding: 0px 0px 0px 0.167em; position: static; vertical-align: 0px;">0</span></span></span><span class="mo" id="MathJax-Span-625" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; font-family: MathJax_Main; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">)</span></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.517em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span>. Xác định tọa độ điểm <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-54-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-626" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.049em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-627" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-628" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">M<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.081em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> thuộc <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-55-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-629" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.494em;"><span style="border: 0px; clip: rect(1.294em 1000em 2.368em -0.523em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-630" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-631" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">d<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.117em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.097em; width: 0px;"></span></span></nobr></span> sao cho tam giác <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-56-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-632" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 2.531em;"><span style="border: 0px; clip: rect(1.272em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-633" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-634" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">A</span><span class="mi" id="MathJax-Span-635" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">M<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.081em;"></span></span><span class="mi" id="MathJax-Span-636" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">B</span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.133em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span> vuông tại <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-57-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-637" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 1.049em;"><span style="border: 0px; clip: rect(1.305em 1000em 2.358em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-638" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mi" id="MathJax-Span-639" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">M<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.081em;"></span></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; width: 0px;"></span></span></span><span style="border-left-style: solid; border-width: 0px 0px 0px 0em; display: inline-block; height: 1.089em; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.083em; width: 0px;"></span></span></nobr></span>.<br /><br /><b>Câu 9.b (1,0 điểm).</b> Giải phương trình <span class="MathJax_Preview" style="color: #888888;"></span><span aria-readonly="true" class="MathJax" id="MathJax-Element-58-Frame" role="textbox" style="border: 0px; direction: ltr; display: inline; float: none; line-height: normal; margin: 0px; padding: 0px; white-space: nowrap; word-spacing: normal; word-wrap: normal;"><nobr style="border: 0px; margin: 0px; max-height: none; max-width: none; padding: 0px; vertical-align: 0px;"><span class="math" id="MathJax-Span-640" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; font-size: 16px; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 9.383em;"><span style="border: 0px; clip: rect(1.154em 1000em 2.608em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-641" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="texatom" id="MathJax-Span-642" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="mrow" id="MathJax-Span-643" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span class="msubsup" id="MathJax-Span-644" style="border: 0px; display: inline; margin: 0px; padding: 0px; position: static; vertical-align: 0px;"><span style="border: 0px; display: inline-block; height: 0px; margin: 0px; padding: 0px; position: relative; vertical-align: 0px; width: 0.928em;"><span style="border: 0px; clip: rect(1.546em 1000em 2.369em -0.521em); left: 0em; margin: 0px; padding: 0px; position: absolute; top: -2.173em; vertical-align: 0px;"><span class="mi" id="MathJax-Span-645" style="border: 0px; display: inline; font-family: MathJax_Math; font-style: italic; margin: 0px; padding: 0px; position: static; vertical-align: 0px;">z<span style="border: 0px; display: inline-block; height: 1px; margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: 0px; width: 0.003em;"></span></span><span style="border: 0px; display: inline-block; height: 2.173em; margin: 0px; padding: 0px; position: static; vertical-align: 0px; 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margin: 0px; overflow: hidden; padding: 0px; position: static; vertical-align: -0.421em; width: 0px;"></span></span></nobr></span> trên tập hợp các số phức.<br /><br /><h1 style="color: #0a0a0a; font-family: Arial, Helvetica, sans-serif; font-size: 22px; margin: 10px 0px 20px; padding: 0px;">
<b>Tags: dap an de thi 2012, dap an de thi khoi d, <a href="http://www.vnmath.com/2012/07/ap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html" style="color: #004276; text-decoration: none;">dap an de thi mon toan khoi d</a>, dap an mon toan khoi d, <a href="http://www.vnmath.com/2012/07/ap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html" style="color: #004276; text-decoration: none;">dap an mon toan khoi d 2012</a>, <a href="http://www.vnmath.com/2012/07/ap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html" style="color: #004276; text-decoration: none;" target="_blank">giai de thi toan khoi d 2012</a>, <a href="http://www.vnmath.com/2012/07/ap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html" style="color: #004276; text-decoration: none;">de thi mon toan khoi d nam 2012</a>.</b><br /><br /><span style="color: white;">Đáp án đề thi môn Toán khối D năm 2012, Đáp án đề thi đại học môn Toán khối D năm 2012,</span></h1>
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Các bài liên quan</h2>
<div id="___plusone_2" style="background-color: transparent; border-style: none; display: inline-block; float: none; font-size: 1px; height: 24px; line-height: normal; margin: 0px; padding: 0px; vertical-align: baseline; width: 106px;">
<iframe allowtransparency="true" frameborder="0" hspace="0" id="I1_1342246039309" marginheight="0" marginwidth="0" name="I1_1342246039309" scrolling="no" src="https://plusone.google.com/_/+1/fastbutton?bsv=pr&url=http%3A%2F%2Fwww.vnmath.com%2F2012%2F07%2Fap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html&size=standard&count=true&origin=http%3A%2F%2Fwww.vnmath.com&hl=en-US&jsh=m%3B%2F_%2Fapps-static%2F_%2Fjs%2Fgapi%2F__features__%2Frt%3Dj%2Fver%3DwQ0XFH8t7lc.vi.%2Fsv%3D1%2Fam%3D!cgao5Fh2qMSYMPraqg%2Fd%3D1%2Frs%3DAItRSTPMc7DwSzwxbjrkZwuJXKf119ww1A#_methods=onPlusOne%2C_ready%2C_close%2C_open%2C_resizeMe%2C_renderstart&id=I1_1342246039309&parent=http%3A%2F%2Fwww.vnmath.com" style="border-style: none; height: 24px; left: 0px; margin: 0px; position: static; top: 0px; visibility: visible; width: 106px;" tabindex="0" title="+1" vspace="0" width="100%"></iframe></div>
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Đề thi Đại học</h4>
<ul style="list-style: square; margin: 20px 0px 20px 30px; padding: 0px;">
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-khoi-b-c-d-e-thi-ai-hoc-nam-2012-cua.html" style="color: #004276; text-decoration: none;">Đáp án khối B, C, D Đề thi Đại học năm 2012 của Bộ Giáo dục</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-moi-ma-e-e-thi-ai-hoc-mon-hoa-khoi-b.html" style="color: #004276; text-decoration: none;">Đã có Đáp án đề thi Đại học môn Hóa khối B năm 2012</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-e-mon-tieng-anh-khoi-d-thi-ai-hoc.html" style="color: #004276; text-decoration: none;">Đáp án Đề môn Tiếng Anh khối D thi Đại học năm 2012 (đã có)</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-e-thi-ai-hoc-mon-toan-khoi-b-nam.html" style="color: #004276; text-decoration: none;">Đáp án Đề thi Đại học môn Toán khối B năm 2012</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-loi-giai-e-thi-ai-hoc-mon-toan-khoi.html" style="color: #004276; text-decoration: none;">Đáp án, Lời giải Đề thi Đại học môn Toán khối D năm 2012</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-e-thi-mon-sinh-khoi-b-nam-2012-moi.html" style="color: #004276; text-decoration: none;">Đáp án Đề thi môn SINH khối B năm 2012 mọi mã đề (279, 415, 524, 731, 836, 957)</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-chinh-thuc-e-thi-ai-hoc-khoi-a1-nam.html" style="color: #004276; text-decoration: none;">Đáp án Chính thức Đề thi Đại học khối A, A1 năm 2012</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/xem-ap-e-thi-ai-hoc-mon-toan-nam-2012.html" style="color: #004276; text-decoration: none;">Xem Đáp án Đề thi Đại học môn Toán năm 2012 khối A, A1 (Phân tích và Bình luận)</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/ap-e-thi-mon-ly-khoi-nam-2012-tat-ca.html" style="color: #004276; text-decoration: none;">Đáp án Đề thi môn Lý khối A năm 2012 tất cả các mã đề</a></li>
<li style="margin: 0px; padding: 0px;"><a href="http://www.vnmath.com/2012/07/du-oan-e-thi-ai-hoc-nam-2012-mon-toan.html" style="color: #004276; text-decoration: none;">Dự đoán Đề thi Đại học năm 2012 môn Toán khối A, A1, B</a></li>
</ul>
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</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-14589257846645774642012-02-20T20:12:00.001-08:002012-02-20T20:12:23.757-08:00Bộ đề kiểm tra giữa học kỳ II do thầy mới pots lên các em down về xem và lam thử nhé link:http://www.mediafire.com/?a7elqga6mc461eeUnknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-73646733315282738072011-11-18T23:18:00.001-08:002011-11-18T23:18:51.828-08:00Bộ đề luyện thi cấp tốc môn toán 2011 -2012Gồm nhiều đè thi hay do thầy Nguyễn Tiến Chinh sưu tầm và biên soạn sẽ giúp ích cho các em ôn thi thật tốt.Link dowload http://www.mediafire.com/?l61vjbvix2r1gbrUnknownnoreply@blogger.com1tag:blogger.com,1999:blog-2377345794831632481.post-81042013874443769792011-11-18T23:16:00.000-08:002011-11-18T23:16:17.572-08:00Bài giảng luyện thi đại học 2011 - 2012Tập tài liệu chứa một lượng kiến thức phong phú và nhiều bài tập đặc sắc theo từng chuyên đề do thầy Nguyễn Tiến Chinh - TTLT Quốc Gia - Đà Nẵng biên soạn.hy vọng giúp các em học sinh và các bạn đồng nghiêp có thêm tài liệu học tập và giảng dạy: link dowload http://www.mediafire.com/?tlt0414k0517k78Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-74773224696617302192011-11-18T21:58:00.001-08:002011-11-18T21:58:49.407-08:00Clip Giải chi tiết Đề Toán Lý Hóa thi Đại học khối A năm 2011<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Bộ Video Clip Giải chi tiết đề thi Đại học khối AL Toán Lý Hóa năm 2011 của HTV4. Các bạn sẽ hiểu thêm và tích lũy kinh nghiệm những cách lập luận và suy nghĩ khi giải các bài toán xuất hiện trong kì thi Đại học Cao đẳng.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5yfQvFV91aSFRDAVdmDp58GLf36IY8lYqeozFvFzLf_CvKBQ2VgYybk_Fyf3V_Fg7IXPgOMmxo7YMkk7uDPAmY23M7SOM3dqJP7UqU5E-aC9Vs3nHI4qJKSIjVvOSP0Kbl8DWDzFM6jo/s1600/2011-snap-2011-07-12.png" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;"><img alt="Clip Giải chi tiết Đề Toán Lý Hóa thi Đại học khối A năm 2011" border="0" id="BLOGGER_PHOTO_ID_5628345772456000386" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5yfQvFV91aSFRDAVdmDp58GLf36IY8lYqeozFvFzLf_CvKBQ2VgYybk_Fyf3V_Fg7IXPgOMmxo7YMkk7uDPAmY23M7SOM3dqJP7UqU5E-aC9Vs3nHI4qJKSIjVvOSP0Kbl8DWDzFM6jo/s400/2011-snap-2011-07-12.png" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 240px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 320px;" /></a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Video Giải đề Môn Toán khối A năm 2011 thực hiện bởi TS. Nguyễn Cam khoa Toán- Tin ĐH Sư Phạm TP HCM. </span><a href="http://mathbookee.blogspot.com/2011/07/video-giai-chi-tiet-de-toan-khoi-nam.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download Clip Giai toan khoi A nam 2011 Nguyen Cam.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Video Giải đề môn Lý thi Đại học năm 2011 của thầy Võ Lý Văn Long, Trung tâm Vĩnh Viễn Mã đề 482.</span><a href="http://mathbookee.blogspot.com/2011/07/video-giai-chi-tiet-de-ly-khoi-nam-2011.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download Clip Giai Vat li khoi A nam 2011 Vo Ly Van Long.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Video Giải đề Hóa Mã đề 683 khối A năm 2011 của thầy Nguyễn Tấn Trung (Vĩnh Viễn). </span><a href="http://mathbookee.blogspot.com/2011/07/video-giai-chi-tiet-de-hoa-khoi-nam.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download Clip Giai Hoa khoi A nam 2011 Nguyen Tan Trung.</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-59704657113711072462011-11-18T21:54:00.000-08:002011-11-18T21:54:26.075-08:00Ôn thi Câu III trong cấu trúc Đề thi Toán của thầy Nguyễn Tất Thu<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> Ôn thi Câu III trong cấu trúc Đề thi Toán của thầy Nguyễn Tất Thu với các nội dung: giới hạn, nguyên hàm, tích phân, diện tích hình phẳng, thể tích vật thể tròn xoay. Tài liệu biên soạn bởi thầy Nguyễn Tất Thu, Biên Hòa, Đồng Nai. </span><a href="http://book.vnmath.com/2011/06/on-thi-cau-iii-de-thi-dai-hoc-mon-toan.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Tải về.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Cùng một tác giả:</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Luyện thi câu I Đề thi Đại học (Khảo sát hàm số). </span><a href="http://book.vnmath.com/2011/04/on-thi-cau-i-de-thi-dai-hoc-mon-toan.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Luyện giải Câu II (phương trình Lượng giác) Đề thi Đại học. </span><a href="http://book.vnmath.com/2011/06/luyen-giai-cau-2-de-thi-dai-hoc.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Xem và Download.</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-14323757156889199542011-11-17T23:14:00.001-08:002011-11-17T23:15:15.353-08:00Sách Bài tập Hình học, Giải tích 12 dùng kèm SGK<b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Sách Giáo khoa Toán lớp 12. </b><b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="http://www.vnmath.com/2010/09/sach-giao-khoa-hinh-hoc-12-giai-tich-12.html" style="color: #004276; text-decoration: none;">Download.</a><br /><br />Sách Giáo viên Toán lớp 12. <a href="http://www.vnmath.com/2010/09/sach-giao-vien-giai-tich-12-hinh-hoc-12.html" style="color: #004276; text-decoration: none;">Download.</a></b><br />
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<b><br /></b><br /><br />Bài tập Hình học 12 (cơ bản). <a href="http://book.vnmath.com/2010/09/bai-tap-hinh-hoc-12-co-ban.html" style="color: #004276; text-decoration: none;">Download.</a><br /><br />Bài tập Giải tích 12 (cơ bản). <a href="http://mathbookee.blogspot.com/2011/09/problems-in-analysis-12.html" style="color: #004276; text-decoration: none;">Download.</a><br /><br />Bài tập Hình học 12 (nâng cao). <a href="http://book.vnmath.com/2010/09/bai-tap-hinh-hoc-12-nang-cao.html" style="color: #004276; text-decoration: none;">Download.</a><br /><br />Bài tập Giải tích 12 (nâng cao). <a href="http://www.vnmath.com/2010/09/bai-tap-giai-tich-12.html" style="color: #004276; text-decoration: none;">Download.</a></div>
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<br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Xem thêm: </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tuyển Tập 750 Bài Tập Toán Giải Tích 12 của Nguyễn Sinh Nguyên. </span><a href="http://www.vnmath.com/2010/09/tuyen-tap-750-bai-tap-toan-giai-tich-12.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Chi tiết.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Phương pháp giải toán trọng tâm ôn thi Đại học của Phan Huy Khải. </span><a href="http://www.vnmath.com/2010/10/phuong-phap-giai-toan-trong-tam-cua.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Chi tiết.</a><div class="widget-content" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
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Các bài liên quan</h2>
</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-78381964326937045942011-11-17T23:12:00.001-08:002011-11-17T23:13:17.802-08:00Liên hệ giữa các bài toán hình học phẳng và hình học không gian<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Liên hệ giữa hình học phẳng và hình học không gian của Trịnh Thị Thanh, Trường THPT chuyên Lê Quý Đôn, TP Đà Nẵng </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Các bài toán sau đây khai thác một vài mở rộng của một số bài toán phẳng sang bài toán trong không gian và sự vận dụng phương pháp giải bài toán phẳng để giải bài toán mở rộng đó. </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Download: </span><a href="http://mathbookee.blogspot.com/2011/08/relations-between-2d-and-3d-geometry.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Lien he giua hinh hoc phang va hinh khong gian</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-19006532375958717562011-11-17T23:10:00.001-08:002011-11-17T23:11:08.257-08:00Luyện tập Câu 4 theo cách ra đề của Bộ với phân tích của thầy Phan Huy Khải<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Câu IV (1 điểm) theo </span><a href="http://www.vnmath.com/2011/06/bo-chuyen-e-on-thi-theo-cau-truc-e-thi.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">cấu trúc của Bộ</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">: Hình học không gian (tổng hợp): quan hệ song song, quan hệ vuông góc của đường thẳng, mặt phẳng; diện tích xung quanh của hình nón tròn xoay, hình trụ tròn xoay; thể tích khối lăng trụ, khối chóp, khối nón tròn xoay, khối trụ tròn xoay; tính diện tích mặt cầu và thể tích khối cầu.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Các </span><a href="http://book.vnmath.com/2011/02/bai-toan-hinh-hoc-trong-de-thi-dai-hoc.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">dạng bài tập Hình không gian ở câu IV trong đề thi Đại học</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> từ 2002 đến nay. Đáp án chi tiết của các câu IV ở trên: </span><a href="http://book.vnmath.com/2010/07/tuyen-tap-de-thi-dai-hoc-mon-toan-2002.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Phân tích của thầy Phan Huy Khải:</span><br />
<center style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><iframe allowfullscreen="" frameborder="0" height="349" src="http://www.youtube.com/embed/beHkoW1h_Bs" width="425"></iframe></center><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Download toàn bộ video của thầy Khải </span><a href="http://www.vnmath.com/2011/04/download-video-luyen-thi-vip-mon-toan.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">tại đây.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Chuyên đề </span><a href="http://book.vnmath.com/2011/06/chuyen-de-tich-khoi-da-dien-le-van-vinh.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Luyện tập Thể tích Khối Đa diện</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> của thầy Lê Văn Vinh</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-45586044599924719402011-11-17T23:08:00.001-08:002011-11-17T23:09:04.192-08:00Bài tập phép biến hình - Hình học 11 nâng cao (đủ dạng)<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> Bài tập phép biến hình - Chương 1 Hình học 11 nâng cao (đủ dạng) bao gồm lý thuyết cơ bản, các dạng toán, bài tập có lời giải theo 8 vấn đề dưới đây: </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 1: Phép dời hình </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 2: Phép tịnh tiến </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 3: Phép đối xứng trục </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 4: Phép đối xứng tâm </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 5: Phép quay </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 6: Hai hình bằng nhau </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 7: Phép vị tự </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Vấn đề 8: Phép phép đồng dạng </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tải về: <a href="http://mathbookee.blogspot.com/2011/09/bai-tap-phep-bien-hinh.html" style="color: #004276; text-decoration: none;">Bai tap phep doi hinh va phep dong dang</a></b><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Xem thêm: </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Chuyên đề Phép biến hình của Nguyễn Đăng Phất. </span><a href="http://book.vnmath.com/2009/06/nguyen-dang-phat-phep-bien-hinh.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download.</a>Unknownnoreply@blogger.com3tag:blogger.com,1999:blog-2377345794831632481.post-5140607688676691452011-11-17T23:07:00.001-08:002011-11-17T23:07:55.532-08:00Bài tập Đề kiểm tra Chương Vecto Hình học 10 (Cơ bản, nâng cao, có lời giải)<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Bài tập hình học 10 - chương 1: Vecto (cơ bản, nâng cao): giúp học sinh lớp 10 nắm vững các dạng toán về vectơ, và một số dạng toán khó cho học sinh giỏi. </span><b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="http://mathbookee.blogspot.com/2011/09/vector-problems-chapter-1-geometry-10.html" style="color: #004276; text-decoration: none;">Download 2.</a>. <a href="http://book.vnmath.com/2011/09/vector-problems-chapter-1-geometry-10.html" style="color: #004276; text-decoration: none;">Download 1.</a> </b><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Xem thêm: </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Bài tập nâng cao va một số chuyên đề Hình học 10 của Nguyễn Minh Hà. </span><a href="http://www.vnmath.com/2010/02/nguyen-minh-ha-bai-tap-nang-cao-va-mot.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Tải về.</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Chuyên đề Hình học 10 của Trần Mai Sang. </span><a href="http://mathbookee.blogspot.com/2011/08/chuyen-de-bai-tap-hinh-hoc-10.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Tải về.</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-40666061358635801582011-11-17T23:06:00.001-08:002011-11-17T23:06:51.515-08:00Bài tập Chương 1: Vectơ - Hình học 10 Nâng cao<br />
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz-prgGWChwnHuBkZ-bI5E1uZAJwNP86fb6BYcikmcBfoJj2yM9JtQC0RAJyZuqIi_vZmZiyv3wJ6xaGqRFwdI88uzxedNopSzSpsCn-KhRDYZk4oQ5t-BKbx0EjaS3CxIgk4k30NiIiw/s1600/CHUONG-1-VECTO-NANG-CAO.png" style="background-color: white; color: #b8240d; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><img alt="Bài tập Chương 1: Vectơ - Hình học 10 Nâng cao " border="0" id="BLOGGER_PHOTO_ID_5672883127561829042" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiz-prgGWChwnHuBkZ-bI5E1uZAJwNP86fb6BYcikmcBfoJj2yM9JtQC0RAJyZuqIi_vZmZiyv3wJ6xaGqRFwdI88uzxedNopSzSpsCn-KhRDYZk4oQ5t-BKbx0EjaS3CxIgk4k30NiIiw/s400/CHUONG-1-VECTO-NANG-CAO.png" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 237px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 390px;" /></a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="http://www.vnmath.com/2011/11/bai-tap-chuong-1-vecto-hinh-hoc-10-nang.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Bài tập Chương 1: Vectơ - Hình học 10 Nâng cao</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">. </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Biên soạn bởi thầy Trần Duy Thái, THPT Gò Công Đông, Tiền Giang. </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tài liệu gồm nhiều dạng bài tập từ cơ bản đến nâng cao theo từng đơn vị bài học trong sách giáo khoa. Tài liệu tham khảo tốt cho giáo viên, học sinh.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tải về file PDF: Bai tap chuong 1 vec to Hinh hoc 10 NC. </span><a href="http://mathbookee.blogspot.com/2011/11/vector-nang-cao-lop-10.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download 1</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">. </span><a href="http://book.vnmath.com/2011/11/vector-nang-cao-lop-10.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download 2</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">.</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-8523372197048252572011-11-17T23:05:00.001-08:002011-11-17T23:05:11.689-08:0012 Đề thi thử Học kì I môn Toán lớp 12<b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="http://www.vnmath.com/2011/11/12-e-thi-thu-hoc-ki-i-mon-toan-lop-12.html" style="color: #b8240d;">12 Đề thi thử Học kì I môn Toán lớp 12</a></b><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> năm học 2011 - 2012 của thầy Nguyễn Bá Tuấn – THPT Xuân Thọ, Đồng Nai gửi đăng trên VNMATH. Các đề thi có nội dung bám sát chương trình Học kì 1 Toán 12. Tài liệu được soạn thảo bằng Word.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tải về file PDF: </span><a href="http://mathbookee.blogspot.com/2011/11/12-de-on-tap-hoc-ki-2-toan-12.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">12 de thi thu hoc ki I mon toan lop 12</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">. </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="http://book.vnmath.com/2011/11/12-de-on-tap-hoc-ki-2-toan-12.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Link dự phòng 2</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">.</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-83009074079308110782011-11-17T23:03:00.001-08:002011-11-17T23:03:50.856-08:00101 Chuyên đề luyện thi môn Toán Đại học năm 2012 -Trần Anh Tuấn (ĐỒ SỘ, HAY)<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> Sách gồm 13 chương, dày 283 trang, hơn 5000 bài toán </span><b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="http://www.vnmath.com/2011/10/101-chuyen-e-luyen-thi-mon-toan-ai-hoc.html" style="color: #004276; text-decoration: none;">101 chuyên đề luyện thi môn Toán năm 2012</a></b><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> của tác giả Trần Anh Tuấn, Đại học Thương Mại Hà Nội. Mỗi chủ đề gồm hàng trăm dạng bài tập bám sát cấu trúc đề thi ĐH năm 2012 và đề thi Đại học những năm gần đây. </span><br />
<center style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqESUwdUSitcLdQupzOSssuw3CyCHCn47oFEKf7qBXMvkz4heEhW3zxEV99IBzb2M5ThMIDKRSDVB0XMLYISyxMc-2Wx3074oE7mzdUrYJ_sjrVo3Uhn-0ljou0zXxyRH_HEK_Zw8j6Fs/s1600/chuyen-de-luyen-thi-dai-hoc-2012.png" style="color: #004276; text-decoration: none;"><img alt="101 Chuyên đề luyện thi Đại học năm 2012, on thi dai hoc mon toan" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgqESUwdUSitcLdQupzOSssuw3CyCHCn47oFEKf7qBXMvkz4heEhW3zxEV99IBzb2M5ThMIDKRSDVB0XMLYISyxMc-2Wx3074oE7mzdUrYJ_sjrVo3Uhn-0ljou0zXxyRH_HEK_Zw8j6Fs/s400/chuyen-de-luyen-thi-dai-hoc-2012.png" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px;" /></a></center><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Với hàng trăm chủ đề lớn nhỏ (chọn số 101 cho đẹp) và lượng bài tập khổng lồ không những thích hợp cho giáo viên làm tài liệu tham khảo để giảng dạy, luyện thi, ra đề mà còn giúp học sinh có nhiều bài tập để lựa chọn để học sinh ôn luyện thi Đại học, Tốt nghiệp năm 2012 cũng như kiểm tra định kì trên lớp. Độc giả có thể thấy sự đồ sộ của bộ chuyên đề Toán này qua phần Mục lục ở cuối bài viết.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tải file PDF (2MB) theo 1 trong các link sau: </span><b style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"><a href="http://mathbookee.blogspot.com/2011/10/101-chuyen-de-luyen-thi-dai-hoc-2012.html" style="color: #004276; text-decoration: none;">101 Chuyen de luyen thi Dai hoc 2012</a></b><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">. </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-15518838692073908962011-11-17T07:39:00.001-08:002011-11-17T07:39:36.817-08:00Các phương pháp giải toán Hình học không gian lớp 11<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Các phương pháp giải toán Hình học không gian lớp 11 của thầy Nguyễn Văn Xê. Tài liệu gồm các phương pháp giải các bài toán liên quan đến quan hệ sông song và quan hệ vuông góc thuộc chương trình Hình học 11. </span><a href="http://mathbookee.blogspot.com/2011/11/phuong-phap-giai-hinh-khong-gian.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download 1</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">. </span><a href="http://book.vnmath.com/2011/11/phuong-phap-giai-hinh-khong-gian.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">Download 2</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">.</span>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-46839838922189168782011-11-17T07:37:00.001-08:002011-11-17T07:38:12.797-08:00Đề cương ôn Thi Học Kì I môn Toán lớp 10 - 11 - 12 (cơ bản, nâng cao)<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> Đề cương ôn Thi Học Kì I môn Toán lớp 10 - 11 - 12 (cơ bản, nâng cao) lấy từ đề cương ôn tập Học kì 1 của trường THPT chuyên Hùng Vương, Gia Lai và THPT Lương Thúc Kỳ, Quảng Nam.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tải về các file PDF sau:</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Lớp 10:</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="http://mathbookee.blogspot.com/2011/11/de-cuong-on-hki-toan-10.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on thi Hoc ki I Toan 10</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> | </span><a href="http://book.vnmath.com/2011/11/de-cuong-on-hki-toan-10.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on HKI Toan 10</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Lớp 11:</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="http://mathbookee.blogspot.com/2011/11/de-cuong-on-hki-toan-11.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on thi Hoc ki I Toan 11</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> | </span><a href="http://book.vnmath.com/2011/11/de-cuong-on-hki-toan-11.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on HKI Toan 11</a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Lớp 12:</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="http://mathbookee.blogspot.com/2011/11/de-cuong-on-hki-toan-12.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on thi Hoc ki I Toan 11</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> | </span><a href="http://book.vnmath.com/2011/11/de-cuong-on-hki-toan-12.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">De cuong on HKI Toan 11</a>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-66114328445675284512011-11-17T00:07:00.001-08:002011-11-17T00:08:07.699-08:00Phạm Hoàng Hiệp, 29 tuổi, ngành toán - Phó giáo sư trẻ nhất Việt Nam năm 2011<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Giảng viên Phạm Hoàng Hiệp, 29 tuổi, chuyên ngành toán (ĐH Sư phạm Hà Nội) là người trẻ nhất vừa được</span><a href="http://www.vnmath.com/2011/11/cac-giao-su-pho-giao-su-nganh-toan-uoc.html" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;">công nhận chức danh Phó giáo sư</a><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;"> trong số 374 người. Thầy Hiệp cho rằng:“Để thành công, hãy luôn đặt câu hỏi tại sao, và cố gắng suy nghĩ giải thích”.</span><br />
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<span style="font-family: Tahoma; font-size: 10pt;">Giảng viên ĐH Sư phạm Hà Nội Phạm Hoàng Hiệp, 29 tuổi, là Phó giáo sư trẻ nhất Việt Nam năm 2011.</span></div>
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<span style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; font-weight: bold; line-height: 19px;">Tôi phải có trách nhiệm nhiều hơn trong nghiên cứu và giảng dạy</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
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<span style="font-style: italic;">Chào anh Phạm Hoàng Hiệp. Được tin mình trở thành Phó giáo sư (PGS) trẻ nhất Việt Nam trong đợt phong năm 2011, tâm trạng của anh thế nào?</span></div>
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Tôi thấy vui vì những cố gắng của mình trong nghiên cứu và dạy học đã được ghi nhận. Tôi cảm thấy phải có trách nhiệm nhiều hơn trong nghiên cứu và giảng dạy.</div>
<span style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; font-style: italic; line-height: 19px;">Nhiều người thường nghĩ học toán rất khô khan và nghèo. Tại sao anh lại chọn nghề toán?</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
Tôi bắt đầu thực sự học Toán khi cuối năm lớp 9, tôi đọc một quyển sách về Số học mà bố tôi mua cho trước đó rất lâu. Sau khi đọc hết quyển sách, tôi thực sự cảm thấy Toán học rất thú vị. Sau đó tôi nghĩ rằng học Trường ĐH Sư phạm thì vừa có thể nghiên cứu, vừa có thể giảng dạy.</div>
<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Mọi người sẽ cho rằng Toán là một môn học rất thú vị nếu có bộ sách, chương trình Toán trực quan, sâu sắc, thực tiễn, chi tiết nhưng lại dễ hiểu, đơn giản. Nhưng tôi cho rằng chỉ những gì người ta thấy dễ hiểu, đơn giản và trực giác được thì họ mới thấy nó thú vị và sử dụng những kiến thức đó vào thực tiễn. Vì vậy tôi luôn cố gắng làm cho Toán học trở lên đơn giản, dễ hiểu. Tuy công việc này không đem lại công trình khoa học mới nhưng đem lại hiểu biết sâu sắc cho chính bản thân và rất tốt cho việc dạy và học Toán.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
Tôi là người có nhiều may mắn trong học tập và nghiên cứu khoa học. Lúc học ở khoa Toán, Trường ĐH Sư phạm Hà Nội, tôi được sự quan tâm và học tập với nhiều giáo sư ở khoa Toán như GS. Nguyễn Văn Khuê, GS. Lê Mậu Hải... Sau đó tôi có cơ hội làm việc với các GS. Urban Cegrell ở ĐH Umea, Thụy Điển, GS. Ahmed Zeriahi và GS. Vicent Guedj, ĐH Toulouse, Pháp. Hiện nay tôi đang làm việc nghiên cứu với GS. Jean-Pierre Demailly, một người có tầm hiểu biết rộng và là một nhà sư phạm tuyệt vời, tại Viện Fourier, ĐH Grenoble, nước Pháp.</div>
<span style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; font-style: italic; line-height: 19px;">Theo anh để thành công trên con đường nghiên cứu toán học, cần có những yếu tố nào? </span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
Theo tôi để thành công trên con đường khoa học là bạn phải có khả năng ước lượng, phán đoán, trực giác. Ngoài những tố chất trên thì cần có sự chịu khó học hỏi, kiên trì và tư duy độc lập.</div>
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<span style="font-family: Tahoma; font-size: 10pt;">Tân PGS Phạm Hoàng Hiệp (<span style="font-style: italic;">ngoài cùng bên trái</span>): <span style="font-size: 10pt;">Trong cuộc sống tôi thường suy nghĩ hãy luôn có một cuộc sống vui vẻ,</span><span style="font-size: 10pt;"> lạc quan và cố gắng trong công việc.</span></span></div>
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<span style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; font-weight: bold; line-height: 19px;">Hãy luôn đặt câu hỏi tại sao</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<span style="font-style: italic;">Nhiều nhà khoa học hiện nay cho rằng nền Toán học Việt Nam đang có nguy cơ thụt lùi, vậy anh nghĩ thế nào? Theo anh cần có giải pháp nào để khắc phục tình trạng này?</span></div>
<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Theo tôi để khoa học phát triển thì các trường đại học cần có mô hình đơn giản và thuần tuý khoa học. Nếu như quy tụ được rất nhiều các nhà khoa học trẻ có tâm huyết vào các trường đại học thì điều này sẽ thành hiện thực.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<span style="font-style: italic;">Anh nhận định toán học có ý nghĩa như thế nào với sự phát triển của đất nước?</span></div>
<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Tôi cho rằng Toán học ảnh hưởng gián tiếp đến sự phát triển của đất nước thông qua chương trình giáo dục. Đặc biệt, Toán học ở các cấp bậc tiểu học, trung học cơ sở, trung học phổ thông ảnh hưởng đến tư duy của tất cả mọi người trong xã hội. Nếu chúng ta làm cho chương trình Toán học trực quan, gắn với thực tiễn, dễ hiểu, đơn giản. Khi đó mọi học sinh đều có tư duy tốt thì họ sẽ là nhân tố giúp đất nước phát triển. Tất nhiên để làm được điều này cần những nhà nghiên cứu Toán học, quan tâm đến giáo dục.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<span style="font-style: italic;">Anh có lời khuyên gì với những bạn trẻ hiện nay?</span></div>
<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Trong cuộc sống tôi thường suy nghĩ hãy luôn có một cuộc sống vui vẻ, lạc quan và cố gắng trong công việc.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 20px; margin-top: 10px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
Để thành công trong học tập và nghiên cứu khoa học, các bạn hãy luôn đặt câu hỏi tại sao, và cố gắng suy nghĩ giải thích, không thể trả lời được thì tìm đến tài liệu, thầy giáo, bạn bè.</div>
<span style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; font-style: italic; line-height: 19px;">Xin trân trọng cảm ơn anh!<br /></span><div style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px; text-align: right;">
<span style="font-style: italic;">Theo Dân tr</span></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-46334058349427452872011-11-17T00:02:00.001-08:002011-11-17T00:03:06.658-08:00Cậu học trò nghèo làm bài thi tốt nghiệp bằng chân<br />
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Cậu học trò nghèo làm bài thi tốt nghiệp bằng chân</h1>
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<span class="meta-author">Posted by VnMaTh.CoM</span> <span class="meta-date">on 01:52</span> <span class="meta-cat">in <a href="http://www.vnmath.com/search/label/G%C6%B0%C6%A1ng%20s%C3%A1ng%20treo%20cao" rel="tag" style="color: #666666; text-decoration: none;">Gương sáng treo cao</a>, <a href="http://www.vnmath.com/search/label/H%E1%BB%8Dc%20sinh%20Gi%E1%BB%8Fi" rel="tag" style="color: #666666; text-decoration: none;">Học sinh Giỏi</a> </span><span class="meta-sep" style="color: #999999; margin-bottom: 0px; margin-left: 3px; margin-right: 3px; margin-top: 0px;">|</span> <span class="meta-comments">1 nhận xét</span></div>
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<iframe allowtransparency="allowTransparency" class="chitikaAdBlock" frameborder="0" height="250" id="ch_ad_ctr550" marginheight="0" marginwidth="0" name="ch_ad_ctr550" scrolling="no" src="about:blank" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;" width="550"></iframe></div>
<iframe allowtransparency="true" frameborder="0" height="0" hspace="0" id="ch_ad550" marginheight="0" marginwidth="0" name="ch_ad550" scrolling="no" src="about:blank" vspace="0" width="0"></iframe> Bị dị tật bẩm sinh, không có hai cánh tay nhưng chàng trai Nguyễn Minh Phú vẫn quyết tâm học viết bằng chân và tham dự <a href="http://www.vnmath.com/2011/06/ap-e-thi-tot-nghiep-2011-chinh-thuc-cua.html" style="color: #004276; text-decoration: none;">kỳ thi tốt nghiệp THPT.</a><div style="margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
<br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm6FOwOKTtExMdlZCh1W36WuG6uEO9600SniYVvdsHwUDOADA4OlDNu-i8GnuyH9fEXnQE-wX-PpD9EkaPqfH8HXm60Aud-fMwlaeVjG5nP3l1hCxVM0FuCg44fOe50zuPZnRSRMG8bfc/s1600/lam-bai-thi-tot-nghieo-bang-chan.jpg" style="color: #004276; text-decoration: none;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5614068901501161282" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjm6FOwOKTtExMdlZCh1W36WuG6uEO9600SniYVvdsHwUDOADA4OlDNu-i8GnuyH9fEXnQE-wX-PpD9EkaPqfH8HXm60Aud-fMwlaeVjG5nP3l1hCxVM0FuCg44fOe50zuPZnRSRMG8bfc/s400/lam-bai-thi-tot-nghieo-bang-chan.jpg" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 343px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 400px;" /></a><br /><i>Sinh ra ở làng quê nghèo xã Thọ Thành huyện Yên Thành (Nghệ An), Nguyễn Minh Phú bị ảnh hưởng chất độc da cam nên từ nhỏ không có hai cánh tay. Thân hình còi cọc, xanh xao nhưng từ nhỏ Phú lại rất ham học. Thấy cô em gái đến trường, Phú cũng cố gắng đi theo rồi nhìn các em học chữ qua cửa sổ lớp học. Về nhà, từ sách vở của em, Phú tự luyện tập viết. Đôi chân mỏi nhừ, lở loét nhưng cậu bé vẫn không bỏ cuộc.</i></div>
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<br />Ban đầu, Phú tập cầm bút bằng chân rồi viết các chữ đơn giản, viết chữ với kích thước lớn, dần dần, chữ nhỏ lại, đẹp hơn. Sau hai năm miệt mài, đến năm 8 tuổi, Phú đã có thể viết chữ bằng chân nắn nót và được nhận vào lớp học.</div>
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<br />Mặc dù gia đình chỉ hy vọng Phú học hết tiểu học nhưng với ý chí, nghị lực, cậu bé Phú đã lần lượt vượt qua các kỳ thi và trở thành học sinh trung học phổ thông với học lực khá, giỏi. Năm 2005, Nguyễn Minh Phú trở thành một trong 10 gương mặt trẻ tiêu biểu toàn quốc do Trung ương Đoàn TNCS Hồ Chí Minh bầu chọn và trở thành tấm gương sáng cho tuổi trẻ tỉnh Nghệ An. Năm học vừa qua, Phú đạt học sinh giỏi tỉnh môn tiếng Anh và đăng kí thi vào đại học ngoại ngữ Hà Nội.<br />Hôm nay, cũng như những học sinh cuối cấp khác, Phú dự thi tốt nghiệp THPT tại Hội đồng thi Bắc Yên Thành, huyện Yên Thành, tỉnh Nghệ An.</div>
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<br />Thầy giáo Nguyễn Bá Thủy - Phó chủ tịch Hội đồng coi thi Trường trung học phổ thông Bắc Yên Thành cho biết, Phú được bố trí ngồi ở bàn đầu để tiện viết bài. Theo các giám thị, em làm bài thậm chí còn làm nhanh hơn nhiều thí sinh lành lặn khác.</div>
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<br />Ngày thi đầu tiên, <i>Phú tự tin với kết quả <a href="http://www.vnmath.com/2011/06/ap-e-thi-tot-nghiep-thpt-mon-ngu-van.html" style="color: #004276; text-decoration: none;">môn Văn</a> và <a href="http://www.vnmath.com/2011/06/ap-e-thi-tot-nghiep-mon-vat-li-thpt-nam.html" style="color: #004276; text-decoration: none;">môn Vật Lý</a></i>. “Dù môn Văn phải viết nhiều, chân có hơi mỏi nhưng em tự tin sẽ đạt kết quả tốt. Môn Vật Lý cũng vừa sức của em”, Phú phấn khởi cho biết.</div>
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<i>Theo VNEXPRESS</i></div>
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</div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-46615782110459054232011-11-17T00:01:00.001-08:002011-11-17T00:01:39.272-08:00Hãy sùng bái Bill Gates, chứ không phải Steve Jobs<br />
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Apple chắc chắn là chuẩn mực vàng của thế giới công nghệ ngày nay. Tình thực mà nói, Apple có lẽ là chuẩn mực vàng của công nghiệp Mỹ hiện tại. Mẫu mã thiết kế đầy sáng tạo, giao diện tiện dụng và hệ sinh thái của Apple đã khiến công ty này trở thành người khổng lồ trong bất cứ chủng loại nào mà nó góp mặt. Và rõ ràng là Steve Jobs là nguyên nhân để Apple vươn lên tầm cao hiện nay từ bờ vực phá sản. Sau khi ông mất, <a href="http://hbr.org/search/steve%252520jobs/" style="color: #004276; text-decoration: none;">Harvard Business Review ca ngợi sự vĩ đại của ông</a> — tôi cũng tán tụng ông. Mà ông đúng là vĩ đại. Steve Jobs có lẽ là nhà lãnh đạo quan trọng nhất trong thế giới kinh doanh của thế hệ chúng ta. Nhưng Steve Jobs không phải là nhà lãnh đạo quan trọng nhất <em>từ</em> thế giới kinh doanh. Tuy Jobs nên là tấm gương để những người có bằng MBA và những nhà thiết kế công nghiệp noi theo, tôi không nghĩ ông là người mà chúng ta nên sùng bái. Sự kính trọng đó nên dành cho một người mà chúng ta ngày càng ít bàn tới: Bill Gates.<span id="more-836"></span></div>
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Cả Jobs và Gates đều có ảnh hưởng vô hạn đối với thế giới. Apple dẫn đường vào kỷ nguyên điện toán phục vụ cá nhân về nhiều khía cạnh. Hệ thống của Microsoft tạo điều kiện cho một thế hệ nhà khoa học máy tính học hỏi và phát triển. Apple dường như đã hoàn thiện nghệ thuật chế tác những sản phẩm tiêu dùng tuyệt diệu. Microsoft đã cần mẫn nỗ lực để giúp doanh nghiệp ngày càng hiệu quả hơn. Bất chấp bạn theo phe nào ủng hộ ai hiện nay, không thể nào bác bỏ đóng góp của mỗi công ty. <a href="http://www.youtube.com/watch?v=1Bk-qTzN7vE&feature=player_embedded#t=39s" style="color: #004276; text-decoration: none;">Jobs và Gates đều hết sức tôn trọng những đóng góp của nhau</a>.</div>
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Nhưng vào cuối đời, Steve Jobs lo lắng cho Apple, Inc. <a href="http://www.aspeninstitute.org/about/about-walter-isaacson/articles-about-walter-isaacson" style="color: #004276; text-decoration: none;">Walter Isaacson</a> trích lời của nhà ảo thuật thành Cupertino nói rằng, “Hewlett và Packard đã xây dựng một công ty vĩ đại, và họ nghĩ họ đã trao lại công ty cho người tài cai quản. Nhưng giờ đây, công ty đó đang bị chia năm xẻ bảy và bị hủy diệt. Tôi hy vọng tôi đã để lại một di sản vững mạnh hơn để điều đó sẽ không bao giờ xảy ra với Apple.” Vào cuối đời, Jobs thấy di sản của mình là Apple.</div>
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<a href="http://blogs.hbr.org/krishnamurthy/2008/06/bill-gates-entrepreneur-manage.html" style="color: #004276; text-decoration: none;">Bill Gates rút lui khỏi Microsoft vào năm 2006</a> và, bất chấp công ty ngày càng gặp nhiều khó khăn trước sự trỗi dậy đầy xáo trộn của công nghệ di động, ông đã hiến dâng thiên tài của mình cho việc giải quyết những vấn đề lớn nhất của thế giới, dù giải quyết những vấn đề đó chẳng tạo lợi nhuận hay mang lại tiếng tăm.* Gates đã dùng những tài năng của mình cho việc loại trừ bệnh tật, tăng các tiêu chuẩn phát triển, và đấu tranh chống bất bình đẳng.</div>
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Kể từ năm 1994, the <a href="http://www.gatesfoundation.org/Pages/home.aspx" style="color: #004276; text-decoration: none;">Quỹ Bill & Melinda Gates</a> đã vận động quyên góp hơn 31 tỉ đô-la để giải quyết những vấn đề khó khăn nhất của thế giới. Nhưng không chỉ quyên tiền, quỹ này còn tặng hơn 25 tỉ đô-la. Những con số đó không phải nhỏ nhoi. Trong 17 năm, quỹ này đã vận động và tặng hơn 1/10 tổng giá trị thị trường cao ngất của Apple. Trong khi các nước đã phát triển xem những thứ như nước sạch, chăm sóc y tế cơ bản, và nguồn cung thực phẩm là chuyện đương nhiên – còn có hàng tỉ người không có những tài nguyên căn bản đó.</div>
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Gandhi từng có câu nói nổi tiếng: “Hãy là sự thay đổi mà bạn muốn thấy diễn ra trên đời.” Tôi không hề nghi ngờ là, trong những năm gần đây, cả Gates và Jobs đều tạo ra sự thay đổi như thế. Jobs làm cho thế giới tươi đẹp hơn và hàng tỉ người có tài lực trong chúng ta yên mến ông vì lẽ đó. Gates đang biến thế giới thành lý tưởng, và hàng tỉ người không có tiếng nói trong chúng ta sẽ mãi mãi chịu tác động.</div>
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Hôm qua, tôi đọc vài lời Gates từng viết nhắn nhủ cho các thành viên của cộng đồng Harvard. Tự thân nó nói lên tất cả:</div>
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<em>Tôi hy vọng các bạn sẽ suy ngẫm về những việc mình đã làm bằng tài năng và sức lực của mình. <em>Tôi hy vọng các bạn sẽ tự đánh giá mình không chỉ về những thành tựu chuyên môn của mình, mà còn về việc bạn nỗ lực đến đâu để xử lý những tình trạng bất công sâu sắc nhất của thế giới, về việc bạn đối xử tử tế đến đâu đối với những người ở phương trời xa không có gì chung với bạn, duy chỉ giống bạn ở tình đồng loại.</em></em></div>
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Đó không phải là lời của một nhà lãnh đạo kinh doanh. Đó là lời của một lãnh tụ nhân dân. Đó là lời của một thần tượng.</div>
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Dù tôi có yêu thích công ty Apple, Inc. đến đâu, tôi vẫn vui lòng từ bỏ chiếc điện thoại iPhone của mình để đặt đồ ăn vào đĩa của những trẻ em đang chết đói. Steve Jobs đã biến công ty của mình thành một doanh nghiệp dẫn đầu cả thập niên trong không gian hoàn toàn mới của công nghệ điện toán di động. Bill Gates đã quyết định loại trừ bệnh sốt rét. Vậy bạn nghĩ chúng ta nên đặt ai lên bệ danh dự để con cháu chúng ta noi gương?</div>
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<em>* Tuy bạn có thể không đồng ý với nhận định đó, chỉ cẩn tra cứu nhanh các xu hướng Google là thấy kể từ rời Microsoft, tiếng tăm ngôi sao Bill Gates đã phai nhạt đáng kể — vào trong năm 2010 đã bị tiếng tăm của Jobs lấn át.</em></div>
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<img alt="wessel.jpg" class="aligncenter" height="104" src="http://blogs.hbr.org/cs/flatmm/wessel.jpg" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; display: block; margin-bottom: 10px; margin-left: auto; margin-right: auto;" width="427" /></div>
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<strong style="color: #545454; font-family: Verdana, Helvetica, Arial, sans-serif; font-weight: bold; line-height: 17px;">Maxwell Wessel</strong></div>
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Bản tiếng Anh: <strong><em><a href="http://blogs.hbr.org/cs/2011/11/idolize_bill_gates_not_steve_j.html" style="color: #004276; text-decoration: none;" target="_blank">Idolize Bill Gates, Not Steve Jobs</a></em></strong><em>, </em>Harvard Business Review Blog Network, 1/11/2011.</div>
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Bản tiếng Việt: PVLH. Blog <strong><em><a href="http://phamvuluaha.wordpress.com/2011/11/03/bill-gates/" style="color: #004276; text-decoration: none;">lên đông xuống đoài</a></em></strong></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-81773269486072106642011-11-16T22:50:00.001-08:002011-11-16T22:50:40.581-08:00Cẩn thận với Hình thức SPAM mới trên Facebook Posted by VnMaTh.CoM on 00:09 in Blogger Tip | 0 nhận xét<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Facebook ngày càng trở nên nguy hiểm đối với người dùng khi mạng xã hội này tiếp tục là công cụ để phát tán virus.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Hình thức lừa đảo thường đánh vào thói tò mò của người dùng bằng các tiêu đề rất “nóng hổi”.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">“SICK – I just hate Rihanna after watching this video” là một trong những trò lừa đảo này, khi bạn bè của bạn bị nhiễm virus này, họ sẽ đăng lên tường của bạn một video (thực chất không phải video mà là liên kết và hình ảnh thôi).</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8-6QuLsIY3XhD_YJc4M5aUXo4mUecCPYoGbRJBrJGZx9lYnPWmPBfZCfdKxBigRnMQzeO3FdrJR0lElwVLoUclsmygTKMnSPPNbAUpV8I9c2WtyUpy9C4FFFFYyBwzCcmLoZVes4TP4M/s1600/17-e1320714625371.png" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5672673401694556738" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh8-6QuLsIY3XhD_YJc4M5aUXo4mUecCPYoGbRJBrJGZx9lYnPWmPBfZCfdKxBigRnMQzeO3FdrJR0lElwVLoUclsmygTKMnSPPNbAUpV8I9c2WtyUpy9C4FFFFYyBwzCcmLoZVes4TP4M/s400/17-e1320714625371.png" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 382px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 400px;" /></a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Khi bạn click chọn vào liên kết này, ngay lập tức bạn đã trở thành nạn nhân và phát tán virus. Virus này sẽ tự động đăng đoạn liên kết “video” lên tường của tất cả bạn bè có trong friendlist của bạn.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-vECqXnJHCLkNQvblbl1rpKMHUT1lr_owHWQT5vPZ-IA1zmtka1myQv3EZPBSNgdPYk-V9bd7ECJ7LgXJcJMJ6l-mBWeaVK2i8VHzUC7T4ClvbDA5TYy2Jp3xMKN9UY1Fg-huK7cyx2M/s1600/48.png" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5672673405208857266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-vECqXnJHCLkNQvblbl1rpKMHUT1lr_owHWQT5vPZ-IA1zmtka1myQv3EZPBSNgdPYk-V9bd7ECJ7LgXJcJMJ6l-mBWeaVK2i8VHzUC7T4ClvbDA5TYy2Jp3xMKN9UY1Fg-huK7cyx2M/s400/48.png" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 400px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 281px;" /></a><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Đây là một hình thức Spam gây phiền toái cho người dùng và có thể gây hiểu lầm với bạn bè của bạn. SPAM là từ viết tắt của Stupid Pointless Annoying Messages (tạm dịch là những tin nhắn vô nghĩa phiền phức). Spam xuất hiện với mục đích quảng cáo, PR cho sản phẩm hay thậm chí là chỉ với mục đích phá hoại.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Với hình thức Spam trên Facebook, người dùng luôn bị tag vô tội vạ những hình ảnh quảng bá sản phẩm hoặc bị đăng lên tường những đoạn liên kết vô nghĩa có ẩn chứa virus. Điều này làm bạn vô cùng khó chịu, thậm chí là bực bội nhiều khi chẳng muốn sử dụng mạng xã hội này nữa.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br />
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<i>Theo Cafef1</i></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-2377345794831632481.post-3585673142118609482011-11-16T22:47:00.001-08:002011-11-16T22:47:59.811-08:00LÀM THẾ NÀO TÔI CÓ THỂ CẬP NHẬT STATUS TRÊN FACEBOOK BẰNG CHỮ MÀU XANH<span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Đây là một Trò Thú Vị để chơi trên Facebook. Bây giờ bạn có thể Update các Status trên Facebook, Post lên Wall, Comment trên các bức ảnh v.v với các Kí Tự Màu Xanh thay vì Màu Đen Truyền Thống như mọi người vẫn đang làm.</span><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><a href="https://www.facebook.com/vnmath" style="background-color: white; color: #004276; font-family: Arial, serif; font-size: 12px; line-height: 19px; text-decoration: none;"><img alt="Cách tạo CHỮ MÀU XANH cho status và comment trên Facebook" border="0" id="BLOGGER_PHOTO_ID_5674507030133914706" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhc6XKi2xUI8LV2Xc3tNKZc-_1ngSuIdQobHSLrV2wp2ZFBBUYua_xuaIS_n8iNpKGd8d7WrvxoAC9U4nj7CPiHbt26Bp06Y58i4rxXTlSRoU2AbbuD61tp9JvtZSKjEiBpdBFrz6dLhog/s400/cach-viet-chu-xanh-tren-facebook.jpg" style="border-bottom-width: 0px; border-color: initial; border-left-width: 0px; border-right-width: 0px; border-style: initial; border-top-width: 0px; cursor: pointer; display: block; height: 300px; margin-bottom: 10px; margin-left: auto; margin-right: auto; margin-top: 0px; text-align: center; width: 381px;" /></a><br />
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<span style="text-decoration: underline;">LÀM THẾ NÀO TÔI CÓ THỂ CẬP NHẬT STATUS TRÊN FACEBOOK BẰNG CHỮ MÀU XANH?</span><br /><br />1. Truy cập vào tài khoản Facebook và định vị nơi mà bạn muốn post status hay comment.</div>
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2. Bây giờ đánh đoạn code: <a href="https://www.facebook.com/vnmath" style="color: #004276; text-decoration: none;">@@[0:[117970064887021:0: ĐOẠN TEXT CỦA BẠN ]]</a> HOẶC COPY NÓ ngay sau đây</div>
<br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><form action="http://www.vnmath.com/2011/11/cach-tao-chu-mau-xanh-cho-status-va.html" method="post" name="form1" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px; margin-bottom: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding-bottom: 0px; padding-left: 0px; padding-right: 0px; padding-top: 0px;">
“ @@[0:[117970064887021:0: ĐOẠN TEXT CỦA BẠN ]] ” (không có dấu “”)</form>
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Mẹo:- Thay <strong>ĐOẠN TEXT CỦA BẠN</strong> trong đoạn Code ở trên bởi những gì bạn muốn post lên facebook và Enter.</div>
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3. Cái bạn Post sẽ có màu xanh và tôi chắc rằng những Friends trên Facebook của bạn sẽ rất ngạc nhiên.</div>
<br style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;" /><span class="Apple-style-span" style="background-color: white; color: #333333; font-family: Arial, serif; font-size: 12px; line-height: 19px;">Chúc thành công.</span>Unknownnoreply@blogger.com0