Calculus: Early Transcendentals 9th Edition

Published by Cengage Learning
ISBN 10: 1337613924
ISBN 13: 978-1-33761-392-7

Chapter 1 - Review - Exercises - Page 69: 32

Answer

$x=\pm \sqrt{e^5}$ or $x\approx \pm12.182$

Work Step by Step

$\ln x^2=5$ (Take the exponent to both sides) $e^{\ln x^2}=e^5$ (Use the property $e^{\ln a}$) $x^2=e^5$ $x=\pm \sqrt{e^5}$ $x=\pm 12.18249....$ $x\approx 12.182$ Thus, $x=\pm \sqrt{e^5}$ or $x\approx \pm12.182$.
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