Answer
See below
Work Step by Step
Evaluate $f(g(x))$: $$f_1(f_1(x))=f_1(x)=x$$
Evaluate $f(y)$: $$f_2(f_2(x))=f_2(-x)=-(-x)=x$$
Hence, the solution is $f_1(x)=x$. Another solution is $f_2(x)=-x$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 6 Rational Exponents and Radical Functions - Mixed Review of Problem Solving - Lessons 6.1-6.3 - Page 436: 5
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