Đáp án:
$\dfrac{(5x-1)^{12}}{60} + C$
Giải thích các bước giải:
$\quad \displaystyle\int(5x-1)^{11}xdx$
$=\dfrac15\displaystyle\int(5x-1)^{11}5xdx$
$=\dfrac15\displaystyle\int(5x-1)^{11}d(5x-1)$
$=\dfrac15\cdot\dfrac{(5x-1)^{12}}{12}+C$
$=\dfrac{(5x-1)^{12}}{60} + C$