Cho hàm số $y=f\left( x \right)$ có đạo hàm ${f}'\left( x \right)$...

Đặt \)">u=x\Rightarrow du=dx,d\upsilon ={f}'\left( x \right)dx\upsilon =\int{{f}'\left( x \right)dx=f\left( x \right)}\int\limits_{0}^{2}{x.{f}'\left( x \right)dx=x.f\left( x \right)\left| _{\begin{smallmatrix}
\\
0
\end{smallmatrix}}^{\begin{smallmatrix}
2 \\

\end{smallmatrix}} \right.-\int\limits_{0}^{2}{f\left( x \right)dx}.}$