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Math Help - integration help

  1. #1
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    integration help

    I need help integrating teh following functioN:

    (x^3)(e^(x^2)
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by messianic View Post
    I need help integrating teh following functioN:

    (x^3)(e^(x^2)
    Apply the substitution u=x^2 to get \tfrac{1}{2}\int ue^u\,du.

    Then apply integration by parts.

    Can you take it from here?
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  3. #3
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    well it is x^3 so the u in the integral should be u^3/2 right? This complicates things. Can you explain further
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  4. #4
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    Quote Originally Posted by messianic View Post
    well it is x^3 so the u in the integral should be u^3/2 right? This complicates things. Can you explain further
    Wrong. Have you been taught how to do a 'u-substitution' when integrating?
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  5. #5
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    yes but a while ago.

    can you please explain it?
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  6. #6
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    Quote Originally Posted by messianic View Post
    yes but a while ago.

    can you please explain it?
    First go back to your class notes or textbook and review the technique. Note that Google will also give many websites that review the technique.
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