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: 19

Answer

Since the function is not right continuous at $ x = -1$, the function is not continuous at $x = -1$

Work Step by Step

$f(-1) = (-1)+3 = 2$ $\lim\limits_{x \to -1^-}f(x) = (-1)+3 = 2 = f(-1)$ As $x$ approaches $-1$ from the left side, the value of the function approaches $f(-1)$. Therefore, the function is left continuous at $x=-1$. $\lim\limits_{x \to -1^+}f(x) = 2^{-1} = \frac{1}{2} \neq f(-1)$ As $x$ approaches $-1$ from the right side, the value of the function does not approach $f(-1)$. Therefore, the function is not right continuous at $x=-1$. Since the function is not right continuous at $ x = -1$, the function is not continuous at $x = -1$
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