Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - Summary Exercises on Inverse, Exponential, and Logarithmic Functions - Exercises - Page 448: 4

Answer

Yes.

Work Step by Step

Given $f(x)=3^{x/5}-2$ and $g(x)=5log_3(x+2)$, we have $f(g(x))=3^{(5log_3(x+2))/5}-2=x+2-2=x$ and $g(f(x))=5log_3((3^{x/5}-2)+2)=5(x/5)=x$. Thus the two functions are inverses of each other.
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