Nếu khối chóp <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">O</span><span class="MJXp-mo" id="MJXp-Span-4" style="margin-left: 0em; margin-right: 0.222em;">.</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-5">A</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-6">B</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-7">C</span></span></span></span><span id="MathJax-Element-1-Frame" class="mjx-chtml MathJax_CHTML MJXc-processed" tabindex="0" style="font-size: 127%;"><span id="MJXc-Node-1" class="mjx-math"><span id="MJXc-Node-2" class="mjx-mrow"><span id="MJXc-Node-3" class="mjx-mstyle"><span id="MJXc-Node-4" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-5" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">O</span></span><span id="MJXc-Node-6" class="mjx-mo"><span class="mjx-char MJXc-TeX-main-R" style="margin-top: -0.145em; padding-bottom: 0.347em;">.</span></span><span id="MJXc-Node-7" class="mjx-mi MJXc-space1"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">A</span></span><span id="MJXc-Node-8" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.445em; padding-bottom: 0.298em;">B</span></span><span id="MJXc-Node-9" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em; padding-right: 0.045em;">C</span></span></span></span></span></span></span><script type="math/tex" id="MathJax-Element-1">\Large O.ABC</script> thỏa mãn <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-8"><span class="MJXp-mstyle" id="MJXp-Span-9"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-10">O</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-11">A</span><span class="MJXp-mo" id="MJXp-Span-12" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-13">a</span></span></span></span><span id="MathJax-Element-2-Frame" class="mjx-chtml MathJax_CHTML MJXc-processed" tabindex="0" style="font-size: 127%;"><span id="MJXc-Node-10" class="mjx-math"><span id="MJXc-Node-11" class="mjx-mrow"><span id="MJXc-Node-12" class="mjx-mstyle"><span id="MJXc-Node-13" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-14" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">O</span></span><span id="MJXc-Node-15" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">A</span></span><span id="MJXc-Node-16" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-17" class="mjx-mi MJXc-space3"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.199em; padding-bottom: 0.298em;">a</span></span></span></span></span></span></span><script type="math/tex" id="MathJax-Element-2">\Large OA=a</script>, <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-14"><span class="MJXp-mstyle" id="MJXp-Span-15"><span class="MJXp-mi MJXp-italic" id="MJXp-Span-16">O</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-17">B</span><span class="MJXp-mo" id="MJXp-Span-18" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-19">b</span></span></span></span><span id="MathJax-Element-3-Frame" class="mjx-chtml MathJax_CHTML MJXc-processed" tabindex="0" style="font-size: 127%;"><span id="MJXc-Node-18" class="mjx-math"><span id="MJXc-Node-19" class="mjx-mrow"><span id="MJXc-Node-20" class="mjx-mstyle"><span id="MJXc-Node-21" class="mjx-mrow" style="font-size: 144%;"><span id="MJXc-Node-22" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">O</span></span><span id="MJXc-Node-23" class="mjx-mi"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.445em; padding-bottom: 0.298em;">B</span></span><span id="MJXc-Node-24" class="mjx-mo MJXc-space3"><span class="mjx-char MJXc-TeX-main-R" style="padding-top: 0.101em; padding-bottom: 0.298em;">=</span></span><span id="MJXc-Node-25" class="mjx-mi MJXc-space3"><span class="mjx-char MJXc-TeX-math-I" style="padding-top: 0.495em; padding-bottom: 0.298em;">b</span></span></span></span></span></span></span><script type="math/tex" id="MathJax-Element-3">\Large OB=b</script>, $\

Nếu khối chóp O.ABCO.ABC thỏa mãn OA=aOA=a, OB=bOB=b, $\

4.2/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

Lưu về Facebook:
Hình minh họa Nếu khối chóp $\Large O.ABC$ thỏa mãn $\Large OA=a$, $\Large OB=b$, $\

Câu hỏi:

Nếu khối chóp O.ABCO.ABC thỏa mãn OA=aOA=a, OB=bOB=b, OC=cOC=cOAOBOAOB, OBOCOBOC, OCOAOCOA thì có thể tích là

Đáp án án đúng là: D

Lời giải chi tiết:

Hình đáp án 1. Nếu khối chóp $\Large O.ABC$ thỏa mãn $\Large OA=a$, $\Large OB=b$, $\

Ta có OAOA, OBOB, OCOC đôi một vuông góc VO.ABC=16.OA.OB.OC=abc6VO.ABC=16.OA.OB.OC=abc6.

Vậy chọn phương án D.