A series is the sum of the terms of an infinite sequence.

Summation notation

This video is a short video to explain the summation notation, symbolized by the greek letter capital Sigma.

Preview Taylor polynomials

This university preview discusses Taylor Polynomials and the way these are used by calculators. 

Taylor polynomials

Use Taylor polynomials to approximate the value of a function at a point by another, simple function. You can get a better approximation using higher order Taylor polynomial.

Preview Fourier Series

This university preview discusses Fourier Series taking two musical instruments as an example.