Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 1 - Precalculus Review - 1.1 Real Numbers, Functions, and Graphs - Exercises - Page 11: 69

Answer

The following graph shows the extended function, so, that the function is even:

Work Step by Step

The even functions are symmetric about the y-axis, i.e., $f(-x)=f(x)$.
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