Answer
All real numbers $x$ such that $x\ne1$
Work Step by Step
The graph is discontinuous at $x=1$ so it is not differentiable at that point.
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 2 - Differentiation - 2.1 Exercises - Page 105: 84
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