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Câu hỏi: Nếu $\int\limits_{0}^{2}{f\left( x \right)\text{d}x}=5$ và $\int\limits_{0}^{2}{g\left( x \right)\text{d}x}=-3$ thì $\int\limits_{0}^{2}{\left[ f\left( x \right)-3g\left( x \right) \right]\text{d}x}$ bằng
A. $14$.
B. $-4$.
C. $8$.
D. $2$.
A. $14$.
B. $-4$.
C. $8$.
D. $2$.
Ta có $\int\limits_{0}^{2}{\left[ f\left( x \right)-3g\left( x \right) \right]\text{d}x}=\int\limits_{0}^{2}{f\left( x \right)\text{d}x}-3\int\limits_{0}^{2}{g\left( x \right)\text{d}x}=5+9=14$.
Đáp án A.