The Taylor and Maclaurin series.

An illustration of a the [color=#c51414]Taylor series[/color] used to approximate a function around a point.[br]When x=0 the series is known as the [color=#c51414]Maclaurin series[/color][br][url]http://mathworld.wolfram.com/TaylorSeries.html[/url]

Information: The Taylor and Maclaurin series.