Answer
$f'''(x)=\dfrac{2}{x^2}.$
Work Step by Step
Using the Power Rule:
$f'''(x)=\dfrac{d}{dx}f''(x)=\dfrac{d}{dx}(2-\dfrac{2}{x})=\dfrac{2}{x^2}.$
Calculus 10th Edition
by Larson, Ron; Edwards, Bruce H.
Published by
Brooks Cole
ISBN 10:
1-28505-709-0
ISBN 13:
978-1-28505-709-5
Chapter 2 - Differentiation - 2.3 Exercises - Page 127: 100
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