Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Chapter 1 - Functions and Limits - 1.6 Calculating Limits Using the Limit Laws - 1.6 Exercises - Page 70: 24



Work Step by Step

$\lim\limits_{h \to 0}\frac{(3+h)^{-1}-3^{-1}}{h}=\lim\limits_{h \to 0}\frac{\frac{1}{3+h}-\frac{1}{3}}{h}=\lim\limits_{h \to 0}\frac{\frac{3-(3+h)}{3(3+h)}}{h}=\lim\limits_{h \to 0}\frac{-h}{3h(3+h)}=\lim\limits_{h \to 0}\frac{-1}{3(3+h)}=\frac{-1}{3(3+(0))}=\frac{-1}{9}=-\frac{1}{9}$
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