Thomas' Calculus 13th Edition

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

Chapter 1: Functions - Section 1.2 - Combining Functions; Shifting and Scaling Graphs - Exercises 1.2 - Page 18: 5

Answer

a. $2$ b. $ 22$ c. $ x^{2}+2$ d. $ x^{2}+10x+22$ e. $5$ f. $-2$ g. $ x+10$ h. $ x^4-6x^2+6$

Work Step by Step

Functions: $ f(x)=x+5$ and $ g(x)=x^{2}-3$ a. $ g(0)=-3$ and $ f(-3)=2$ so $ f(g(0))=2$ b. $ f(0)=5$ and $ g(5)=22$ so $ g(f(0))=22$ c. $ f(g(x))=x^{2}-3+5=x^{2}+2$ d. $ g(f(x))=(x+5)^{2}-3=x^{2}+10x+22$ e. $ f(-5)=-5+5=0$ so $ f(f(-5))=f(0)=0+5=5$ f. $ g(2)=2^2-3=1$ so $ g(g(2))=g(1)=1^2-3=-2$ g. $ f(f(x))=(x+5)+5=x+10$ h. $ g(g(x))=(x^2-3)^2-3=x^4-6x^2+9-3=x^4-6x^2+6$
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