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U substitution

  1. Dec 9, 2011 #1
    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. jcsd
  3. Dec 9, 2011 #2


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    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
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