College Algebra (11th Edition)

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

Chapter 4 - Section 4.3 - Logarithmic Functions - 4.3 Exercises - Page 422: 13

Answer

$-4$

Work Step by Step

Rewrite using definition of logarithm. $5^x=\frac{1}{625}$ Rewrite to powers of 5. $5^x=5^{-4}$ $a^b=a^c$ means $b$ and $c$ are equivalent. $x=-4$
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