Answer
Makes sense.
Work Step by Step
Yes, otherwise you would have an occurrence of log(negative number), which is not defined.
We can't have a solution for which the equation is undefined.
Makes sense.
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 3.4 - Exponential and Logarithmic Equations - Exercise Set - Page 491: 140
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