Resuelve la integral

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✎ Solución paso a paso

1. 1
   $$u=\sqrt{x}\Rightarrow x=u^2,dx=2udu$$
2. 2
   $$=\int \frac{2u}{u(9+u^2)}du=2\int \frac{du}{9+u^2}$$
3. 3
   $$=2\cdot \frac{1}{3}\arctan \frac{u}{3}$$

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