Question - integrate the following:
(int) (4- (e^x))^3 e^x dx
attempt:
u = (4 + e^x)
n = 3
du = e^x
therefore answer is:
((4 + (e^x))^4) / 4 + c
which is incorrect, and should be:
4 / (e^(x^1/2)) + c
Stared at it for a while and can't figure it out. Any help, thanks?