In this video, we introduce the idea of a series, as well as the notion of convergence/divergence, arguably one of the most important parts of calculus.
00:00 - Introduction
00:46 - Definition of a series
02:12 - Example 1
03:33 - Partial sums
06:54 - Convergence/Divergence
09:19 - Example 2
12:50 - Example 3
14:34 - Example 4
16:56 - The test for divergence
18:20 - Example 5
20:47 - Some simple rules
![](https://i.ytimg.com/vi/QDjwP47Cz6Y/maxresdefault.jpg)