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Math Help - integration by parts question

  1. #1
    Newbie cwashburn's Avatar
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    integration by parts question

    If I have \int (x-1) e^\frac{-x}{2} and am integrating by parts can I have x-1 = u and e^\frac{-x}{2} = dv

    or should I multiply through the x-1 so that I am integrating this -

    \int x e^\frac{-x}{2} - \int e^\frac{-x}{2}

    Does it matter?
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  2. #2
    A Plied Mathematician
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    You can do it either way. As for assigning u and dv, refer to this.
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  3. #3
    Newbie cwashburn's Avatar
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    Thank you for the speedy reply Ackbeet, and it just validates my reasoning for donating to the website. This is a fantastic community!
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  4. #4
    A Plied Mathematician
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    You're very welcome. And thank you for donating!
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