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Math Help - Exponential Integration : Please help me...

  1. #1
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    Exponential Integration : Please help me...

    I come across this problem. I need help to solve this problem

    Integral ( (ax^3) / ((e^(bx)) - 1) dx
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  2. #2
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    Quote Originally Posted by Gupta View Post
    I come across this problem. I need help to solve this problem

    Integral ( (ax^3) / ((e^(bx)) - 1) dx
    For general values of a and b, it can't be done using a finite number of elementary functions. See below what happens when a = b = 1, for example. Perhaps it's meant to be a definite integral ....?
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  3. #3
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    Krizalid's Avatar
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    Quote Originally Posted by mr fantastic View Post
    Perhaps it's meant to be a definite integral ....?
    Pretty sure of it.

    Mostly times I've seen people tryin' to compute (like if always would exist) an antiderivative for the function, but they don't realize the importance of the integration limits.
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  4. #4
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    Thanks

    I was braking my head

    I did not believe WOLFRAM

    You are correct , it is definite integral. I am an engineer and strukup here.

    warm regards and thanks
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