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Câu hỏi: Nếu $\int\limits_{-1}^{2}{f\left( x \right)}\text{d}x=1022,\int\limits_{2}^{4}{f\left( x \right)}\text{d}x=1000$ thì $\int\limits_{-1}^{4}{f\left( x \right)}\text{d}x$ bằng
A. $1011.$
B. $0$.
C. $4044$.
D. $2022$.
A. $1011.$
B. $0$.
C. $4044$.
D. $2022$.
Ta có: $\int\limits_{-1}^{4}{f\left( x \right)}\text{d}x=\int\limits_{-1}^{2}{f\left( x \right)}\text{d}x+\int\limits_{2}^{4}{f\left( x \right)}\text{d}x=1022+1000=2022$.
Đáp án D.