Answer
22
Work Step by Step
$\frac{d}{dy}(f(x)g(x))$ evaluated @ x=1
$=f(x)g'(x)+f'(x)g(x)$
$=f(1)g'(1)+f'(1)g(1)$
$=5\times2+3\times4$
$=22$
Calculus: Early Transcendentals (2nd Edition)
by Briggs, Bill L.; Cochran, Lyle; Gillett, Bernard
Published by
Pearson
ISBN 10:
0321947347
ISBN 13:
978-0-32194-734-5
Chapter 3 - Derivatives - 3.4 The Product and Quotient Rules - 3.4 Exercises - Page 161: 74
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