#### Answer

22

#### Work Step by Step

$\frac{d}{dy}(f(x)g(x))$ evaluated @ x=1
$=f(x)g'(x)+f'(x)g(x)$
$=f(1)g'(1)+f'(1)g(1)$
$=5\times2+3\times4$
$=22$

Published by
Pearson

ISBN 10:
0321947347

ISBN 13:
978-0-32194-734-5

22

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