13 videos
3 skills
You're familiar with sequences and have been eager to sum them up. Well wait no longer! In this tutorial, we'll see that series are just sums of sequences and familiarize ourselves with the notation.

Sigma notation for sums

VIDEO 4:27 minutes

Introduction to geometric series

VIDEO 2:53 minutes
Think about a geometric series as the sum of a geometric sequence.

Evaluating finite arithmetic series

Find the sum of the first n terms of an arithmetic sequence.

Using properties of series to find a sum

VIDEO 6:54 minutes
Watch Sal use the properties of sigma notation to make a difficult problem easy!

Partial sum notation

VIDEO 6:09 minutes
Partial sum notation

Challenge: Sigma notation properties

Test yourself on some tricky properties of sigma notation.

Infinite series as limit of partial sums

VIDEO 4:48 minutes
Infinite series as limit of partial sums