Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 4 - Inverse, Exponential, and Logarithmic Functions - 4.1 Inverse Functions - 4.1 Exercises - Page 418: 65

Answer

not one-to-one

Work Step by Step

This function $f(x)=x^2+8$ is not one-to-one, because $y=x^2+8\longrightarrow x^2=y-8\longrightarrow x=\pm\sqrt {y-8}$. There are two $x$ values for some $y$.
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