9.2 Taylor Series Quick Review Find a formula for the nth derivative of the function.

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Presentation transcript:

9.2 Taylor Series

Quick Review Find a formula for the nth derivative of the function.

Quick Review

What you’ll learn about Constructing a Series Series for sin x and cos x Beauty Bare Maclaurin and Taylor Series Combining Taylor Series Table of Maclaurin Series Essential Question How can we use partial sums of a Taylor series to approximate the function represented by the series?

Taylor Series Generated by f at x=0 (Maclaurin Series) Let f be a function with derivatives of all orders throughout some open interval containing 0. Then the Taylor series generated by f at x = 0 is This series is also called the Maclaurin series generated by f. is the Taylor polynomial of order n for f at x = 0.

Example Constructing a Power Series for sin x 1.Construct the seventh order Taylor polynomial and the Taylor series for sin x at x = 0. The Taylor series:

Example Approximating a Function near 0 2.Find the fourth order Taylor polynomial that approximates y = cos 2x near x = 0.

Taylor Series Generated by f at x=a Let f be a function with derivatives of all orders throughout some open interval containing a. Then the Taylor series generated by f at x = a is is the Taylor polynomial of order n for f at x = a.

Example A Taylor Series at x = 1 3.Find the Taylor series generated by f (x) = e x at x = 1.

Example A Taylor Polynomial for a Polynomial 4.Find the third order Taylor polynomial for f (x) = x 3 + 3x 2 – x + 1 at x = 0. Since the polynomial is already written in powers of x and is of degree three, then it is its own third order Taylor polynomial at x = 0. 5.Find the third order Taylor polynomial for f (x) = x 3 + 3x 2 – x + 1 at x = 1.

Maclaurin Series

Pg. 386, 9.2 #1-25 odd