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Câu hỏi: Nếu $\int\limits_{0}^{1}{f\left( x \right)\text{d}x}=-2023$ và $\int\limits_{0}^{1}{g\left( x \right)}\text{d}x=2022$ thì $\int\limits_{0}^{1}{\left[ 2022f\left( x \right)+2021g\left( x \right) \right]\text{d}x}$ bằng
A. –2.
B. –4045.
C. –2022.
D. –4044.
A. –2.
B. –4045.
C. –2022.
D. –4044.
$\int\limits_{0}^{1}{\left[ 2022f\left( x \right)+2021g\left( x \right) \right]\text{d}x}=2022\cdot \int\limits_{0}^{1}{f\left( x \right)\text{d}x}+2021\cdot \int\limits_{0}^{1}{g\left( x \right)\text{d}x}$
$=2022\cdot \left( -2023 \right)+2021\cdot 2022=-4044$
$=2022\cdot \left( -2023 \right)+2021\cdot 2022=-4044$
Đáp án D.