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Math Help - Integration problem

  1. #1
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    Integration problem

    Ok how shall i go about this one..

    I = (x^2)*(e^(x^3))

    I know the rule:

    I = f(x)^n*f'(x)dx = 1/n+1*f(x)^(n+1) + C

    I cant quite see how it fits with this particular problem..

    Can anyone help...
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  2. #2
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    Quote Originally Posted by dankelly07 View Post
    Ok how shall i go about this one..

    I = (x^2)*(e^(x^3))

    I know the rule:

    I = f(x)^n*f'(x)dx = 1/n+1*f(x)^(n+1) + C

    I cant quite see how it fits with this particular problem..

    Can anyone help...
    I think it would be quite clear if you substituted u=x^3, du=3x^2~dx
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  3. #3
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    Sep 2007
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    Ah that was alot easier than I thought

    This is the rule I needed...

    I = f'(x)*e^f(x)dx = e^(f(x)) + c

    Thanks alot
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