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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If $\displaystyle y$ is independent of $\displaystyle x,$ then let $\displaystyle u=1+x^{2}+y^{2}.$ Where does that lead?
Math program gave this solution: -1/(Sqrt[1+x^2+y^2]) I have no idea how to get it. Help please.
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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