Answer
$ f^{-1}(x)=log_2(x-1)$
Work Step by Step
$f(x)=1+2^x \Longrightarrow y=1+2^x \Longrightarrow x=1+2^y \Longrightarrow y=log_2(x-1) \Longrightarrow f^{-1}(x)=log_2(x-1)$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 6 - Analytic Trigonometry - Section 6.1 The Inverse Sine, Cosine, and Tangent Functions - 6.1 Assess Your Understanding - Page 476: 83
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