Answer
$-1$
Work Step by Step
RECALL:
$\log_b{b^x} = x.$
Write $\dfrac{1}{5}$ as $5^{-1}$ to obtain
$\log_5{5^{-1}}.$
Use the rule above t obtain
$-1.$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 3 - Section 3.2 - Exponential Functions - Exercise Set - Page 463: 25
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