U substitution

1. Dec 9, 2011

jennie312

The problem: The definite integral of [(x^2sinx)/(1+x^6)]*dx on the interval -∏/2 ≤ x ≤ ∏/2

I need help figuring out what the u should be for substitution.

I've been trying to make the (1+x^6) my u, but I don't know if this is what I should be doing.

2. Dec 9, 2011

Dick

There's no elementary integral for that. Can you think of some way to show it's zero without doing the integral? Try thinking about what a graph would look like.

Last edited: Dec 9, 2011