Answer
From the graph, the derivative does not exist at approximately, $x=-0.7$ and $x=1.2$
Work Step by Step
The derivative does not exist at cusps or sharp points. From the graph, cusps exist at approximately $x=-0.7$ and $x=1.2$.
Calculus, 10th Edition (Anton)
by Anton, Howard
Published by
Wiley
ISBN 10:
0-47064-772-8
ISBN 13:
978-0-47064-772-1
Chapter 2 - The Derivative - Chapter 2 Review Exercises - Page 184: 14
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