Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition

Published by Brooks Cole
ISBN 10: 1-43904-957-2
ISBN 13: 978-1-43904-957-0

Chapter 3 - Determining Change: Derivatives - Review Activities - Page 246: 5

Answer

$$g'\left( x \right) = 4 - \frac{7}{x}$$

Work Step by Step

$$\eqalign{ & g\left( x \right) = 4x - 7\ln x \cr & {\text{Calculate the derivative of the function}} \cr & g'\left( x \right) = \frac{d}{{dx}}\left( {4x} \right) - \frac{d}{{dx}}\left( {7\ln x} \right) \cr & {\text{Drop out the constants}} \cr & g'\left( x \right) = 4\frac{d}{{dx}}\left( x \right) - 7\frac{d}{{dx}}\left( {\ln x} \right) \cr & {\text{Compute derivatives}}{\text{, }} \cr & g'\left( x \right) = 4\left( 1 \right) - 7\left( {\frac{1}{x}} \right) \cr & g'\left( x \right) = 4 - \frac{7}{x} \cr} $$
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