Answer
$(c) $
Work Step by Step
Since $ f'(a) = f'(b) = 0$ and $f'(c) >0$ , then the only graph that has positive slope at $c $ is $(c)$.
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: 11
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