[tex]\int[/tex][tex]\stackrel{du}{\sqrt{u^{2}-4}}[/tex] = ln(u + sqrt.(u(adsbygoogle = window.adsbygoogle || []).push({}); ^{2}-4))

My answer key makes the jump directly from that integral to that natural log fxn, which would make sense to me if only the "u +" weren't inside the brackets of the ln fxn.

Does anyone know where it comes from?

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# Homework Help: Integral of 1/(something)

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