Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 7 - Section 7.5 - Strategy for Integration - 7.5 Exercises - Page 508: 56

Answer

$$\int \frac{dx}{\sqrt{x}+x\sqrt{x}}=2arctan\,\sqrt{x}+C$$

Work Step by Step

$$let\ x=t^{2},\,dx=2t\,dt$$ $$\int \frac{dx}{\sqrt{x}+x\sqrt{x}}=\int \frac{2t}{t+t^{3}}dt=\int \frac{2}{1+t^{2}}dt$$ $$=2arctan\,t+C=2arctan\,\sqrt{x}+C$$
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