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Math Help - Finding Integral

  1. #1
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    Post Finding Integral

    How to find : Integral [x*dx/( (1+ x^2 + y^2)^(3/2) )] ?

    If we would have Integral [x*dx/( (1+ x^2 + y^2)^(1/2) )] => there is could be replacement.
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  2. #2
    A Plied Mathematician
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    If y is independent of x, then let u=1+x^{2}+y^{2}. Where does that lead?
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  3. #3
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    Math program gave this solution:

    -1/(Sqrt[1+x^2+y^2])
    I have no idea how to get it. Help please.
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  4. #4
    A Plied Mathematician
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    If you've done any integration study at all, you've studied u substitutions. Take another look at my post # 2, and try that. If you don't interact with the help you're given, then I'm afraid the Math Help Forum isn't going to be much use to you.
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