Intergration my parts. Reduce.

[killersanta]

Homework Statement

S P^4 e^-P DP

Homework Equations

My parts.

The Attempt at a Solution

I know you can do u = P^4, and DV = e^-P
Then, you get du = 4P^3 dx and V = -e^-P

-P^4 e^P + S 4P^3 e^-p dx

Now, I can just repeat that for the intergral until I get to were the P goes away, but I believe my teacher said something about an easier way. It's called reduce something. Can someone fill me in the name and how it works? Or maybe I heard wrong.

 

[LCKurtz]

You are probably thinking of the "tabular method" of integrating by parts. Look at:

http://en.wikipedia.org/wiki/Integration_by_parts

and scroll down to the tabular method section.