Answer
$(b) $
Work Step by Step
We see that $ f'(a)= f'(b)= 0$ and $f'(c) \lt 0 $ and the only graph that represents a differentiable function at $a$ and $b $ and has negative
slope at $c$ is $(b).$
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0-32187-896-5
ISBN 13:
978-0-32187-896-0
Chapter 4: Applications of Derivatives - Section 4.1 - Extreme Values of Functions - Exercises 4.1 - Page 191: 12
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