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Thread: intergration help please

  1. April 29th 2008, 03:38 PM #1
    Legendsn3verdie
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    intergration help please

    \int (-infty.to.infinty) xe^{-x^2}
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  2. April 29th 2008, 03:44 PM #2
    mr fantastic
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    Quote Originally Posted by Legendsn3verdie View Post

    \int_{-\infty}^{\infty} xe^{-x^2} \, dx
    First, I fixed the latex and added the dx.

    x e^{-x^2} is an odd function so \int_{-a}^{a} xe^{-x^2} \, dx = 0. Therefore ......

    (Note: Following on from ....... will give you the Cauchy Principle Value).
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