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