Jawabanmu

2014-09-03T22:11:06+07:00
Integral x (x²+5)³ dx 
misal :
u = x²+5
du/dx = 2x
dx =1/2x du

integral x (x²+5) dx =
integral x . u³ . 1/2x du =
integral u³ . 1/2 du =
1/4 . 1/2 u (pangkat 4) + C =
1/8 (x²+5)pangkat 4 + C