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Câu hỏi: Nếu $\int\limits_{0}^{2}{f\left( x \right)\text{d}x}=4$ thì $\int\limits_{0}^{2}{\left[ \dfrac{1}{2}f\left( x \right)-2 \right]\text{d}x}$ bằng
A. $0.$
B. $6.$
C. $8.$
D. $-2.$
A. $0.$
B. $6.$
C. $8.$
D. $-2.$
$\int\limits_{0}^{2}{\left[ \dfrac{1}{2}f\left( x \right)-2 \right]\text{d}x}=\dfrac{1}{2}\int\limits_{0}^{2}{f\left( x \right)\text{d}x}-\int\limits_{0}^{2}{2\text{d}x}=\dfrac{1}{2}.4-4=-2$.
Đáp án D.