Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter 4 - Calculating the Derivative - Chapter Review - Review Exercises - Page 244: 8

Answer

False

Work Step by Step

$$\eqalign{ & {\text{Let }}f\left( x \right) = \ln \left| x \right|{\text{ and }}g\left( x \right) = \ln x \cr & {\text{The derivative of }}g\left( x \right) = \ln x{\text{ is}} \cr & g'\left( x \right) = \frac{1}{x},{\text{ }} \cr & {\text{The domain of }}\ln x{\text{ is }}D:\left( {0,\infty } \right) \cr & g'\left( x \right) = \frac{1}{x}{\text{ is always positive for all }}\left( {0,\infty } \right),{\text{ then the slope}} \cr & {\text{is positive for }}\left( {0,\infty } \right). \cr & \cr & {\text{The domain of }}f\left( x \right) = \ln \left| x \right|{\text{ is }}D:\left( { - \infty ,0} \right) \cup \left( {0,\infty } \right) \cr & f'\left( x \right) = \frac{1}{x},{\text{ the slope is defined for }}x < 0{\text{ then the derivatives}} \cr & {\text{are not equal}}.{\text{ But for }}x > {\text{0 the statement is True}} \cr} $$
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