Answer
$(e)$
Work Step by Step
$\log_{7}20=\log_{7}(5\cdot 4)$
... apply $\log_{a}(MN)=\log_{a}M+\log_{a}N$
$=\log_{7}(5)+\log_{7}(4)$
... case $(e)$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 12 - Exponential Functions and Logarithmic Functions - 12.4 Properties of Logarithmic Functions - 12.4 Exercise Set - Page 809: 1
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