Answer
0
Work Step by Step
$f'(x)=\lim\limits_{h \to 0}\frac{f(x+h)-f(x)}{h}=\lim\limits_{h \to 0}\frac{12-12}{h}=\lim\limits_{h \to 0}\frac{0}{h}=0$ (as h$\ne$0)
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 3 - Differentiation - 3.1 Definition of the Derivative - Exercises - Page 103: 18
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