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Câu hỏi: Nếu $\int\limits_{-1}^{3}{f\left( x \right)\text{d}x}=2023$ và $\int\limits_{-1}^{3}{g\left( x \right)\text{d}x}=2022$ thì $\int\limits_{-1}^{3}{\left[ f\left( x \right)-g\left( x \right) \right]\text{d}x}$ bằng
A. $5$.
B. $-1$.
C. $6$.
D. $1$.
A. $5$.
B. $-1$.
C. $6$.
D. $1$.
Ta có $\int\limits_{-1}^{3}{\left[ f\left( x \right)-g\left( x \right) \right]\text{d}x}=\int\limits_{-1}^{3}{f\left( x \right)\text{d}x}-\int\limits_{-1}^{3}{g\left( x \right)\text{d}x}=1$.
Đáp án D.