Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 1: Functions - Practice Exercises - Page 37: 35


a. $1$ b. $\sqrt {2/5}$ c. $ x $ d. $\frac{1}{\sqrt {1/\sqrt {x+2}+2}}$

Work Step by Step

a. $ g(-1)=1,f(g(-1))=f(1)=1$ b. $ f(2)=1/2, g(1/2=\sqrt {2/5})$ c. $ f(f(x))=\frac{1}{1/x}=x $ d. $ g(g(x))=\frac{1}{\sqrt {1/\sqrt {x+2}+2}}$
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