Answer
$ln(1+e^x)+C$
Work Step by Step
$u=1+e^x; du=e^xdx$
$\int \frac {du} u$
$ln|u|+C$
$ln(1+e^x)+C$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 8 - Integration Techniques, L'Hopital's Rule, and Improper Integrals - 8.1 Exercises - Page 512: 25
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