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., $f(-x)=f(x)$.
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
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
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