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## Homework Statement

Use integration by parts to prove the reduction formula:

http://img214.imageshack.us/img214/1234/24206074.jpg [Broken]

## Homework Equations

## The Attempt at a Solution

what confuses me about this question is that its not in the form sqrt(a

^{2}+ x

^{2}) but its in ^n instead of sqrt.. so how do i do that?

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