Answer
The inverse of $f$ is not a function
Work Step by Step
$f(x)=x^2+4$ is a parabola. Parabola can be intersected by horizontal line more than once, so using horizontal line test, inverse of $f$ is not a function.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 10 - Radical Functions and Equations - Chapter Review - Page 578: 22
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