College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter 4 - Section 4.5 - Exponential and Logarithmic Equations - 4.5 Exercises - Page 446: 29


$x-\ln4$ or $x=\ln2$

Work Step by Step

Let $u=e^x$ $e^{2x}-6^x+8=0$ $u^2-6u+8=0$ Factor. $(u-4)(u-2)=0$ $u=4$ or $u=2$ $e^x=4$ or $e^x=2$ $x-\ln4$ or $x=\ln2$
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