Answer
See below.
Work Step by Step
The student is probably talking about the Quotient Rule which says that $\log_a x-\log_a y=\log_a (\frac{x}{y})$, where division "becomes" subtraction and vice versa.
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 4 - Exponential and Logarithmic Functions - Exercise Set 4.3 - Page 478: 111
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