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Câu hỏi: Nếu $\int\limits_{0}^{1}{f\left( x \right)\text{d}x}=4$ và $\int\limits_{0}^{1}{g\left( x \right)\text{d}x}=-3$ thì $\int\limits_{0}^{1}{\left[ 2f\left( x \right)-g\left( x \right) \right]\text{d}x}$ bằng
A. $11$.
B. $5$.
C. $3$.
D. $8$.
A. $11$.
B. $5$.
C. $3$.
D. $8$.
Ta có: $\int\limits_{0}^{1}{\left[ 2f\left( x \right)- g\left( x \right) \right]\text{d}x}= 2\int\limits_{0}^{1}{f\left( x \right)\text{d}x}- \int\limits_{0}^{1}{g\left( x \right)\text{d}x}= 2.4-\left( -3 \right)=11$.
Đáp án A.