Answer
a) $2x$
b) $4$
Work Step by Step
a) The slope of the tangent line at a general x-value is the derivative.
$\frac{d}{dx} x^2+1 = 2x$ by the power rule.
b) We substitute $x=2$ to get the slope: $2x = 2(2) = 4$.
Calculus, 10th Edition (Anton)
by Anton, Howard
Published by
Wiley
ISBN 10:
0-47064-772-8
ISBN 13:
978-0-47064-772-1
Chapter 2 - The Derivative - Chapter 2 Review Exercises - Page 183: 3
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