The Taylor Polynomial

Return to Numerical Methods - Numerical Analysis

Example 2. (a) Find the Taylor polynomial of degree n = 5 for [Graphics:tp2.txtgr1.gif], expanded about [Graphics:tp2.txtgr2.gif].

First, find the derivatives of f(x).

[Graphics:tp2.txtgr4.gif][Graphics:tp2.txtgr3.gif]

Second, evaluate the derivatives of f(x) at x = 2, and obtain a sequence of constants [Graphics:tp2.txtgr5.gif].

[Graphics:tp2.txtgr4.gif][Graphics:tp2.txtgr6.gif]

Third, substitute the constants [Graphics:tp2.txtgr7.gif] in Taylor's formula.

[Graphics:tp2.txtgr4.gif][Graphics:tp2.txtgr8.gif]

[Graphics:tp2.txtgr4.gif][Graphics:tp2.txtgr9.gif]

[Graphics:tp2.txtgr4.gif][Graphics:tp2.txtgr10.gif]

 

Example 2. (b) Find the Taylor polynomial of degree n = 8.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(c) John H. Mathews, 1998