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