integral of:

3(x^4/e^x^5)dx

I'm pretty sure its substitution rule but I don't know what to put as the u

u=x^4?

u=e^x^5 help!

and:

integral of:

5e^s/1+3e^s

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- Mar 5th 2008, 11:57 PMs0urgrapeshelp! integrals! - URGENT
integral of:

3(x^4/e^x^5)dx

I'm pretty sure its substitution rule but I don't know what to put as the u

u=x^4?

u=e^x^5 help!

and:

integral of:

5e^s/1+3e^s - Mar 6th 2008, 12:40 AMxifentoozlerix

- Mar 6th 2008, 06:48 AMs0urgrapes
- Mar 6th 2008, 08:54 AMxifentoozlerix
Well, let's see what happens if you do :

As you can see, the term cancels and you end up with a different integral. With however, the top in the numerator is taken care of, and it leaves the in the denominator as the original problem had: