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Câu hỏi: cho $\int\limits_{0}^{3}{f\left( x \right)\text{d}x=\dfrac{5}{3}}$ ; $\int\limits_{0}^{4}{f\left( x \right)\text{d}x=\dfrac{3}{5}}$. Tích phân $\int\limits_{3}^{4}{f\left( x \right)\text{d}x}$ bằng
A. $\dfrac{-16}{15}$.
B. $\dfrac{14}{15}$.
C. $-\dfrac{17}{15}$.
D. $\dfrac{8}{15}$.
A. $\dfrac{-16}{15}$.
B. $\dfrac{14}{15}$.
C. $-\dfrac{17}{15}$.
D. $\dfrac{8}{15}$.
Ta có: $\int\limits_{0}^{3}{f\left( x \right)\text{d}x+} \int\limits_{3}^{4}{f\left( x \right)\text{d}x=\int\limits_{0}^{4}{f\left( x \right)\text{d}x\Rightarrow }}\int\limits_{3}^{4}{f\left( x \right)\text{d}x=-\dfrac{16}{15}}$.
Đáp án A.