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Math Help - volume problem

  1. December 9th 2007, 08:45 AM #1
    akhayoon
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    volume problem

    find the region by rotating about the y-axis

    y=e^{-x^2}~~~x-axis~~~~~x=0~~~~and ~~x=1

    I was thinking

    v=2pix\int_{0}^{1}e^{-x^2}
    Last edited by akhayoon; December 9th 2007 at 04:25 PM. Reason: typo
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  2. December 9th 2007, 04:26 PM #2
    akhayoon
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    but is that enough to bound the entire region or do I need another function?
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  3. December 9th 2007, 04:43 PM #3
    galactus
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    You're on the right track, except that x belongs inside the integral.

    2{\pi}\int_{0}^{1}xe^{-x^{2}}dx
    Last edited by galactus; November 24th 2008 at 06:38 AM.
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« General Solution to a Differential Equation | Evaluate the Integral »

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