Giúp em câu 10 vs câu 11 ạ

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Giúp em câu 10 vs câu 11 ạ
giup-em-cau-10-vs-cau-11-a

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Khánh Gia 4 years 2020-10-13T16:41:54+00:00 1 Answers 91 views 0

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  1. Nho
    0
    2020-10-13T16:43:30+00:00
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    Câu 10:

    $f(0)+f(1)+f(2)=\dfrac{\sqrt{3.0+2}}{2.0-3}+\dfrac{\sqrt{3.1+2}}{2.1-3}+\dfrac{\sqrt{3.2+2}}{2.2-3}=\dfrac{5\sqrt2-3\sqrt5}{3}$

    $\to C$

    Câu 11:

    $y_1=f(x_1)=\dfrac{2.1-1}{4.1^2+3.1-6}=1$

    $y_2=f(x_2)=\dfrac{-2.2-1}{4.2^2-2.3-6}=\dfrac{-5}{4}$

    $\Rightarrow y_1+y_2=\dfrac{-1}{4}$

    $\to B$

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