College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 2, Functions - Section 2.7 - Combining Functions - 2.7 Exercises - Page 252: 28


(a) -1 (b) -21

Work Step by Step

We are given: $f(x)=2x-3$ and $g(x)=4-x^2$ We evaluate: (a) $f(f(2))=f(2*2-3)=f(1)=2*1-3=-1$ (b) $g(g(3))=g(4-3^{2})=g(4-9)=g(-5)=4-(-5)^{2}=-21$
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