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Câu hỏi: Nếu $u=u\left( x \right)$ và $v=v\left( x \right)$ là hai hàm số có đạo hàm liên tục trên đoạn $\left[ a;b \right]$ thì
A. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{{u}'\left( x \right).v\left( x \right)dx}$
B. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{u\left( x \right).v\left( x \right)dx}$
C. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}+}\int\limits_{a}^{b}{{u}'\left( x \right).v\left( x \right)dx}$
D. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx}$.
A. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{{u}'\left( x \right).v\left( x \right)dx}$
B. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{u\left( x \right).v\left( x \right)dx}$
C. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}+}\int\limits_{a}^{b}{{u}'\left( x \right).v\left( x \right)dx}$
D. $\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx=\left. \left( u\left( x \right)v\left( x \right) \right) \right|_{a}^{b}-}\int\limits_{a}^{b}{u\left( x \right).{v}'\left( x \right)dx}$.
Đáp án A.
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