# Math Help - Integration problem

1. ## Integration problem

I = (x^2)*(e^(x^3))

I know the rule:

I = f(x)^n*f'(x)dx = 1/n+1*f(x)^(n+1) + C

I cant quite see how it fits with this particular problem..

Can anyone help...

2. Originally Posted by dankelly07

I = (x^2)*(e^(x^3))

I know the rule:

I = f(x)^n*f'(x)dx = 1/n+1*f(x)^(n+1) + C

I cant quite see how it fits with this particular problem..

Can anyone help...
I think it would be quite clear if you substituted $u=x^3$, $du=3x^2~dx$

3. Ah that was alot easier than I thought

This is the rule I needed...

I = f'(x)*e^f(x)dx = e^(f(x)) + c

Thanks alot