Intergal dr x per (10 - x pangkat 2)

integral x / (10 - x^2)
misal 10-x^2 = u
du/dx = -2x
dx = du/-2x
integral x / u du/-2x
= integral x u^-1 du/-2x
= -1/2 integral u^-1 du
= -1/2 (u^(-1+1)/(-1+1) + c
= -1/2 u^0/0
= tak tentu.