i don't see why the following integral:[tex]\int\frac{dx}{\sqrt{x}(x + 1)}[/tex] uses the arctan formula. i know how to solve integrals. i just don't see why or how you can rewrite it using the arctan formula. Isn't the arctan formula used for integrals of the form: [tex]\int\frac{du}{a^2 + u^2}=\frac{1}{a}arctan\frac{u}{a}[/tex](adsbygoogle = window.adsbygoogle || []).push({});

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# Integral form

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