Biết <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-8">4</span></span></span></span><span class=" MJXp-script"><span><span style="margin-top: -0.85em;"><span class="MJXp-mrow" id="MJXp-Span-5"><span class="MJXp-mo" id="MJXp-Span-6">−</span><span class="MJXp-mn" id="MJXp-Span-7">3</span></span></span></span></span></span></span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-9">f</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">x</span><span class="MJXp-mo" id="MJXp-Span-12" style="margin-left: 0em; margin-right: 0em;">)</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-13">d</span><span class="MJXp-mi MJXp-italic" id="MJXp-Span-14">x</span><span class="MJXp-mo" id="MJXp-Span-15" style="margin-left: 0.333em; margin-right: 0.333em;">=</span><span class="MJXp-mo" id="MJXp-Span-16" style="margin-left: 0.267em; margin-right: 0.267em;">−</span><span class="MJXp-mn" id="MJXp-Span-17">4</span></span></span></span><script type="math/tex" id="MathJax-Element-1">\large \int_{-3}^4 f(x) dx=-4</script> và $\large \int_{-3}^4 g(x) dx= 3

Biết 43f(x)dx=4 và $\large \int_{-3}^4 g(x) dx= 3

4.7/5

Tác giả: Thầy Tùng

Đăng ngày: 18 Aug 2022

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Câu hỏi:

Biết 43f(x)dx=4 và 43g(x)dx=3, khi đó 43[f(x)2g(x)] bằng 

Đáp án án đúng là: B

Lời giải chi tiết:

Chọn B

Ta có: 43[f(x)2g(x)]dx=43f(x)dx243g(x)dx=42.3=10