Section 12.8 Power Series AP Calculus March 25, 2010 CASA
Calculus, Section 12.8, Todd Fadoir, CASA, 2005 Power Series A power series is a series in the form: We use “c” because they act like coefficients; it looks to be an infinitely long polynomial. Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Power Series Centered at a A power series centered at a is the form: Because of this distinction, we sometimes call a power series centered at zero Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005 Insight Power Series are always convergent at their “center” Why? Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005 Theorem Power Series is always convergent in one of three ways Only at the “center” (x=a) For all values x=(-∞,∞) There is some R (called the radius of convergence) that creates an interval of convergence (a-R,a+R). The series may or may not be convergent at the endpoints. Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005
Calculus, Section 12.8, Todd Fadoir, CASA, 2005 Assignment 12.8: 1-27 odd Calculus, Section 12.8, Todd Fadoir, CASA, 2005