Answer
$p'=\frac{-1}{2\sqrt (3-t)}$
Work Step by Step
Take the derivative and apply the chain rule:
$p'=1/2(3-t)^{-1/2}\times -1=\frac{-1}{2\sqrt (3-t)}$
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 3: Derivatives - Section 3.6 - The Chain Rule - Exercises 3.6 - Page 148: 19
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