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Math Help - Difficult Integration

  1. #1
    Junior Member sweet's Avatar
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    Difficult Integration

    I have Difficult Integration

    I was try to solve in many ways but i cant

    if any one know how ,, I will greatfull

    download | ifile.it
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  2. #2
    Senior Member
    Joined
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    Hi sweet

    I think it's better if you type your question here. If you don't know how to type it, you can learn it here : http://www.mathhelpforum.com/math-he...-tutorial.html

    I'll help you this time to type your question.

    \int_0^{t}\frac{du}{1-\frac{\delta - a}{2\delta}e^{(\delta - a)u}}

    What are \delta and a? Are they independent of u ?
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  3. #3
    Junior Member sweet's Avatar
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    thank u songoku


    about  \delta and a ,they are a constant ..
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  4. #4
    Senior Member
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    Hi sweet

    So, in order to simplify the integral, we can write:

    \int^t_0\frac{du}{1-pe^{ru}} , where p and r are constants

    You can :
    1. multiply the integral by \frac{e^{-ru}}{e^{-ru}}

    or

    2. write the numerator as 1 - pe^(ru) + pe^(ru)

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