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 - 3.6 Activities - Page 237: 10

Answer

$f^{'}(x)=39[16x(1+15e^{-0.09x})^{-1} +1.35(8x^2+13)(1+15e^{-0.09x})^{-2}]$

Work Step by Step

$f(x)=(8x^2+13)( \frac{39}{1+15e^{-0.09x}})$ $f(x)=39 (8x^2+13)(1+15e^{-0.09x})^{-1}$ $f^{'}(x)=39[16x(1+15e^{-0.09x})^{-1} +(8x^2+13)(-1)(1+15e^{-0.09x})^{-2}(15\times-0.09)]$ $f^{'}(x)=39[16x(1+15e^{-0.09x})^{-1} +1.35(8x^2+13)(1+15e^{-0.09x})^{-2}]$
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