Answer
a) 2
b) 3
Work Step by Step
The definition of an inverse is if $f(x)=u$ then $f^{-1}(u)=x$ so x is the answer in all scenarios. In a, x=2 and in b, x=3.
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 2 - Section 2.8 - One-to-One Functions and Their Inverses - 2.8 Exercises - Page 226: 25
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