Answer
$\log_{3}243=5$.
Work Step by Step
For $a>0, a\neq 1$, and $x>0,\ y=\log_{a}x$ means $a^{y}=x$.
.....................................................
$ 3^{5}=243 \qquad$ means the same as
$\log_{3}243=5$.
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 2 - Nonlinear Functions - Chapter Review - Review Exercises - Page 113: 55
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