Answer
14
Work Step by Step
$k'(z)=\lim\limits_{h \to 0}\frac{k(z+h)-k(z)}{h}=\lim\limits_{h \to 0}\frac{[14(z+h)+12]-[14z+12]}{h}$
$=\lim\limits_{h \to 0}\frac{14z+14h+12-14z-12}{h}=14$
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: 20
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