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Câu hỏi: Nếu $\int\limits_{-2}^{3}{f\left( x \right)\text{d}x}=2$ và $\int\limits_{-2}^{3}{\left[ f\left( x \right)+g\left( x \right) \right]\text{d}x}=7$ thì $\int\limits_{-2}^{3}{g\left( x \right)\text{d}x}$ bằng
A. $-5$.
B. $9$.
C. $5$.
D. $-9$.
A. $-5$.
B. $9$.
C. $5$.
D. $-9$.
Ta có $\int\limits_{-2}^{3}{\left[ f\left( x \right)+g\left( x \right) \right]\text{d}x}=\int\limits_{-2}^{3}{f\left( x \right)\text{d}x}+\int\limits_{-2}^{3}{g\left( x \right)\text{d}x}$ nên $\int\limits_{-2}^{3}{g\left( x \right)\text{d}x}=7-2=5$.
Đáp án C.