Cho <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-msubsup" id="MJXp-Span-3"><span class="MJXp-mo" id="MJXp-Span-4" style="margin-left: 0em; margin-right: 0.05em;">∫</span><span class="MJXp-script-box" style="height: 1.86em; vertical-align: -0.64em;"><span class=" MJXp-script"><span><span style="margin-bottom: -0.25em;"><span class="MJXp-mn" id="MJXp-Span-6">5</span></span></span></span><span class=" MJXp-script"><span><span style="margin-top: -0.85em;"><span class="MJXp-mn" id="MJXp-Span-5">2</span></span></span></span></span></span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-7">f</span><span class="MJXp-mo" id="MJXp-Span-8" style="margin-left: 0em; margin-right: 0em;">(</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-9">x</span><span class="MJXp-mo" id="MJXp-Span-10" style="margin-left: 0em; margin-right: 0em;">)</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-11">d</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-12">x</span><span class="MJXp-mo" id="MJXp-Span-13" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mn" id="MJXp-Span-14">4</span></span></span></span><script type="math/tex" id="MathJax-Element-1">\large \int_2^5 f(x)dx= 4</script> và <span class="MathJax_Preview" style="color: inherit;"><span class="MJXp-math" id="MJXp-Span-15"><span class="MJXp-mstyle" id="MJXp-Span-16"><span class="MJXp-msubsup" id="MJXp-Span-17"><span class="MJXp-mo" id="MJXp-Span-18" style="margin-left: 0em; margin-right: 0.05em;">∫</span><span class="MJXp-script-box" style="height: 1.86em; vertical-align: -0.64em;"><span class=" MJXp-script"><span><span style="margin-bottom: -0.25em;"><span class="MJXp-mn" id="MJXp-Span-20">5</span></span></span></span><span class=" MJXp-script"><span><span style="margin-top: -0.85em;"><span class="MJXp-mn" id="MJXp-Span-19">2</span></span></span></span></span></span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-21">g</span><span class="MJXp-mo" id="MJXp-Span-22" style="margin-left: 0em; margin-right: 0em;">(</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-23">x</span><span class="MJXp-mo" id="MJXp-Span-24" style="margin-left: 0em; margin-right: 0em;">)</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-25">d</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-26">x</span><span class="MJXp-mo" id="MJXp-Span-27" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mn" id="MJXp-Span-28">3</span></span></span></span><script type="math/tex" id="MathJax-Element-2">\large \int_2^5 g(x) dx= 3</script>. Khi đ

Cho $\large \int_2^5 f(x)dx= 4$ và $\large \int_2^5 g(x) dx= 3$ . Khi đ

4.5/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Lời giải chi tiết

Câu hỏi:

Cho $\large \int_2^5 f(x)dx= 4$ và $\large \int_2^5 g(x) dx= 3$ . Khi đó: $\large \int_2^5 [2f(x)- 3g(x)]dx$ bằng

A. 1
B. 12
C. 7
D. -1

Đáp án án đúng là: D

Lời giải chi tiết:

Chọn D

Ta có: $\large \int_2^5 [2f(x)- 3g(x)]dx= \int_2^5 g(x)dx- 3\int_2^5 g(x)dx = 2.4- 3.3 = -1$

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