Tính <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-1"><span class="MJXp-mstyle" id="MJXp-Span-2"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-3">K</span><span class="MJXp-mo" id="MJXp-Span-4" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-msubsup" id="MJXp-Span-5"><span class="MJXp-mn" id="MJXp-Span-6" style="margin-right: 0.05em;">4</span><span class="MJXp-mrow MJXp-script" id="MJXp-Span-7" style="vertical-align: 0.5em;"><span class="MJXp-mn" id="MJXp-Span-8">3</span><span class="MJXp-mo" id="MJXp-Span-9">+</span><span class="MJXp-msqrt" id="MJXp-Span-10"><span class="MJXp-surd"><span style="font-size: 134%; margin-top: 0.104em;">√</span></span><span class="MJXp-root"><span class="MJXp-rule" style="border-top: 0.08em solid;"></span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-11">2</span></span></span></span></span></span><span class="MJXp-msubsup" id="MJXp-Span-12"><span class="MJXp-mn" id="MJXp-Span-13" style="margin-right: 0.05em;">.2</span><span class="MJXp-mrow MJXp-script" id="MJXp-Span-14" style="vertical-align: 0.5em;"><span class="MJXp-mn" id="MJXp-Span-15">1</span><span class="MJXp-mo" id="MJXp-Span-16">−</span><span class="MJXp-msqrt" id="MJXp-Span-17"><span class="MJXp-surd"><span style="font-size: 134%; margin-top: 0.104em;">√</span></span><span class="MJXp-root"><span class="MJXp-rule" style="border-top: 0.08em solid;"></span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-18">2</span></span></span></span></span></span><span class="MJXp-mo" id="MJXp-Span-19" style="margin-left: 0.111em; margin-right: 0.167em;">:</span><span class="MJXp-msubsup" id="MJXp-Span-20"><span class="MJXp-mn" id="MJXp-Span-21" style="margin-right: 0.05em;">2</span><span class="MJXp-mrow MJXp-script" id="MJXp-Span-22" style="vertical-align: 0.5em;"><span class="MJXp-mn" id="MJXp-Span-23">4</span><span class="MJXp-mo" id="MJXp-Span-24">+</span><span class="MJXp-msqrt" id="MJXp-Span-25"><span class="MJXp-surd"><span style="font-size: 134%; margin-top: 0.104em;">√</span></span><span class="MJXp-root"><span class="MJXp-rule" style="border-top: 0.08em solid;"></span><span class="MJXp-box"><span class="MJXp-mn" id="MJXp-Span-26">2</span></span></span></span></span></span></span></span></span><script type="math/tex" id="MathJax-Element-1">\Large K=4^{3+\sqrt{2}}.2^{1-\sqrt{2}}:2^{4+\sqrt{2}}</script>, ta được:

Tính K=43+2.212:24+2, ta được:

4.9/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

Lưu về Facebook:

Câu hỏi:

Tính K=43+2.212:24+2, ta được: 

Đáp án án đúng là: D

Lời giải chi tiết:

Chọn D

K=43+2.212:24+2=22(3+2).212:24+2=22(3+2)+12(4+2)=8