Answer
Please see below.
Work Step by Step
If $\lim_{x \to a^-}f(x)=L$ and $\lim_{x \to a^+}f(x)=M$, where $L \neq M$, then it means that $\lim_{x \to a}f(x)$ does not exist.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 11 - Section 11.1 - Finding Limits Using Tables and Graphs - Exercise Set - Page 1141: 82
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