Answer
$2$
Work Step by Step
RECALL:
$\log_b{b^x} = x.$
Write 49 as $7^2$ to obtain
$\log_7{7^2}.$
Use the rule above to obtain
$2.$
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: 22
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