Answer
$f''(x)=2940(2-7x)^2$.
Work Step by Step
Using the Chain Rule:
$f'(x)=(5)(-7)(4)(2-7x)^{4-1}=-140(2-7x)^3$.
Using the Chain Rule:
$f''(x)=(-140)(-7)(3)(2-7x)^{3-1}=2940(2-7x)^2$.
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 2 - Differentiation - 2.4 Exercises - Page 137: 85
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