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Câu hỏi: Nếu $\int\limits_{0}^{2}{f\left( x \right)\text{d}x}=4$ và $\int\limits_{0}^{2}{g(x)\text{d}x}=3$ thì $\int\limits_{0}^{2}{\left[ 3f\left( x \right)-2g\left( x \right) \right]\text{d}x}$ bằng
A. $-1$.
B. $6$.
C. $8$.
D. $17$.
A. $-1$.
B. $6$.
C. $8$.
D. $17$.
Ta có $\int\limits_{0}^{2}{\left[ 3f\left( x \right)-2g\left( x \right) \right]\text{d}x}=3\int\limits_{0}^{2}{f\left( x \right)\text{d}x}-2\int\limits_{0}^{2}{g(x)\text{d}x}=3\cdot 4-2\cdot 3=6$.
Đáp án B.