Answer
-2
Work Step by Step
$f^{\prime}(x)=\ \ ($Sum rule$)\ \ =[1]^{\prime}-[2x]^{\prime}=$
$\ \ ($Constant rule, Constant times x $)\ \ $
=$0-2$
$=-2$
the slope of the tangent at x=$2$
$=f^{\prime}(2)=-2$
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 11 - Section 11.1 - Derivatives of Powers, Sums, and Constant Multiples - Exercises - Page 795: 55
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