Calculus: Early Transcendentals 8th Edition

Published by Cengage Learning
ISBN 10: 1285741552
ISBN 13: 978-1-28574-155-0

Chapter 2 - Section 2.5 - Continuity - 2.5 Exercises - Page 124: 17

Answer

Infinite discontinuity at $-2$. See graph.

Work Step by Step

$f(-2)$ is undefined. To try and visualize this we use: $\lim\limits_{x \to -2^{-}} f(x) = \lim\limits_{x \to -2^{-}} \frac{1}{x+2}= -\infty$ $\lim\limits_{x \to -2^{+}} f(x) = \lim\limits_{x \to -2^{+}} \frac{1}{x+2}= \infty$ Both of these answers are not the same, so the $\lim\limits_{x \to -2} f(x)$ does not exist.
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