Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 3 - Differentiation - 3.4 Rates of Change - Exercises - Page 129: 5


$d' = 2$

Work Step by Step

First, we look at the relationship between the diameter and the radius: $d = 2r$ Then, to find the rate of change, we take the derivative in terms of r to get $d' = 2$
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