Introduction to Geometric Sequences

This video from our sequences and series playlist explains the basics of geometric sequences: determining if a sequence is a geometric sequence, finding the common ratio of a geometric sequence, and writing an explicit formula for a geometric sequence. We work examples of each of these. This is a common topic found in an algebra or precalculus course.
0:00 What is a geometric sequence?
0:48 Common ratio of a geometric sequence
1:16 Examples (Is it geometric? Common ratio?)
5:18 Geometric sequence formula
5:45 Examples (Writing a formula for a sequence)