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Math Help - Integration!!!

  1. #1
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    Integration!!!

    I havnt done calculus in a while and need help doing this integral... Im pretty sure it has to do with integation by parts but am not sure. <br><br>Integral of&nbsp; x^2e^(-kx)&nbsp; with limits 0 to positive infinity. Thanks!!! <br>
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  2. #2
    MHF Contributor kalagota's Avatar
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    Quote Originally Posted by clipperdude21 View Post
    I havnt done calculus in a while and need help doing this integral... Im pretty sure it has to do with integation by parts but am not sure. <br><br>Integral of&nbsp; x^2e^(-kx)&nbsp; with limits 0 to positive infinity. Thanks!!! <br>
    did u mean this?

    \int_0^\infty x^2e^{-kx}dx

    use integration by parts twice..
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  3. #3
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    would u=x^2 and dv= the rest for the 1st? Im lost with calculus lol
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  4. #4
    MHF Contributor kalagota's Avatar
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    Quote Originally Posted by clipperdude21 View Post
    would u=x^2 and dv= the rest for the 1st? Im lost with calculus lol
    yes..
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