Dear Forum,(adsbygoogle = window.adsbygoogle || []).push({});

I've been trying to find a proof for the following:

[tex]

\int \frac{x}{a^2+x^2}dx = \frac{1}{2}\ln|a^2+x^2|+c

[/tex]

After many hours I've resorted to asking for help - any ideas anyone?

cheers,

mazzo

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# Proof rational integral

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