integral tertentu, tolong bantu ya

#maaf jika salah semoga membantu

1. L=[x⁴]
L=(3)⁴-(2)⁴
L=81-16
L=65

2.
[tex]( \frac{ x - 1}{ {x}^{3} } ) \\ = (x - 1)( {x}^{ - 3} ) \\ = ( {x}^{ - 2} ) - ( {x}^{ - 3} ) \: di \: integralkan\\ = ( { -x}^{ - 1} ) - ( - \frac{1}{2} { x}^{ - 2} ) \\ = ( - \frac{1}{x} ) + ( \frac{1}{2 {x}^{2} } ) \\ = \frac{1 - 2x}{2 {x}^{2} } \\ = \frac{ 1 - 2(1)}{ 2({1}^{2})} - \frac{ 1 - 2(2)}{2( {2}^{2} )} \\ = - \frac{ 1}{2} + \frac{ 3}{8} \\ = - \frac{1}{8}[/tex]

Maaf jika ada kesalahan, mohon dikoreksi