Answer
$f(x)=5^x$
Work Step by Step
For $f(x)=a^x$ to contain point $(3,125)$, we have $f(3)=a^3=125$ which gives $a=5$, thus $f(x)=5^x$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.2 Exponential Functions - 4.2 Exercises - Page 434: 118
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