Answer
$5^{13}=u$
Work Step by Step
We know that if $a^x=y$, then $\log_a{y}=x$ and vice versa.
Hence if $\log_5{u}=13$, then $5^{13}=u$.
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - Chapter Review - Review Exercises - Page 345: 15
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