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Câu hỏi: Nếu $\int\limits_{0}^{2}{f\left( x \right)\text{d}x}=5$ thì $\int\limits_{0}^{2}{\left[ f\left( x \right)-3 \right]\text{d}x}$ bằng
A. $8$.
B. $4$.
C. $2$.
D. $-1$.
A. $8$.
B. $4$.
C. $2$.
D. $-1$.
$\int\limits_{0}^{2}{\left[ f\left( x \right)-3 \right]\text{d}x}=\int\limits_{0}^{2}{f\left( x \right)\text{d}x}-3\int\limits_{0}^{2}{\text{d}x}=5-3\left. x \right|_{0}^{2}=5-6=-1$.
Đáp án D.