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Câu hỏi: Cho hai hàm số $u=u\left( x \right)$ và $v=v\left( x \right)$ có đạo hàm liên tục trên khoảng $K$. Khẳng định nào dưới đây đúng?
A. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right)v\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
B. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x={u}'\left( x \right)v\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
C. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right)v\left( x \right)-\int{u\left( x \right)v\left( x \right)}\text{d}x$
D. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right){v}'\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
A. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right)v\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
B. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x={u}'\left( x \right)v\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
C. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right)v\left( x \right)-\int{u\left( x \right)v\left( x \right)}\text{d}x$
D. $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right){v}'\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$
Khẳng định đúng là $\int{u\left( x \right){v}'\left( x \right)}\text{d}x=u\left( x \right)v\left( x \right)-\int{u'\left( x \right)v\left( x \right)}\text{d}x$.
Đáp án A.