Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 10: Infinite Sequences and Series - Section 10.8 - Taylor and Maclaurin Series - Exercises 10.8 - Page 618: 5

Answer

$A_{0}$=$\frac{1}{2}$ $A_{1}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$ $A_{2}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$+$\frac{(x-2)^{2}}{8}$ $A_{3}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$+$\frac{(x-2)^{2}}{8}$-$\frac{(x-2)^{3}}{16}$

Work Step by Step

The Taylor polynomial is defined for the function f(x) at the point a of order n as: An(x)=f(a)+f′(a)$\frac{x-a}{1!}$+f′′(a)$\frac{(x-a)^{2}}{2!}$+....+$f^{n}(a)$$\frac{(x-a)^{n}}{n!}$ Now we get, f(x)=$\frac{1}{x}$ f(2)=$\frac{1}{2}$ f′(2)=$\frac{-1}{x^{2}}$ =$\frac{-1}{4}$ f′′(2)=$\frac{2}{x^{3}}$ =$\frac{1}{4}$ f′′′(2)=$\frac{-6}{x^{4}}$ =$\frac{-3}{8}$ This implies, $A_{0}$=$\frac{1}{2}$ $A_{1}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$ $A_{2}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$+$\frac{(x-2)^{2}}{8}$ $A_{3}$=$\frac{1}{2}$ -$\frac{(x-2)}{4}$+$\frac{(x-2)^{2}}{8}$-$\frac{(x-2)^{3}}{16}$
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