Answer
$ log_7(\frac{xy^3}{x+y})$
Work Step by Step
$log_7x+3log_7y-log_7(x+y)=log_7x+log_7y^3-log_7(x+y)=log_7(\frac{xy^3}{x+y})$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 7 - Applications of Trigonometric Functions - Section 7.5 Simple Harmonic Motion; Damped Motion; Combining Waves - 7.5 Assess Your Understanding - Page 577: 66
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