# Geometric sequences

4 videos
5 skills
Review geometric sequences before you dive into geometric series.

### Intro to geometric sequences

VIDEO 10:45 minutes
Sal introduces geometric sequences and their main features, the initial term and the common ratio.

### Intro to geometric sequences (advanced)

VIDEO 6:39 minutes
Sal introduces geometric sequences and gives a few examples. Notation used in this video is relatively advanced.

### Extend geometric sequences

PRACTICE PROBLEMS
Given the first few terms in a geometric sequence, find the next term in the sequence.

### Use geometric sequence formulas

PRACTICE PROBLEMS
Given the formula of a geometric sequence, either in explicit form or in recursive form, find a specific term in the sequence.

### Explicit & recursive formulas for geometric sequences

VIDEO 5:38 minutes
Sal finds an explicit formula of a geometric sequence given the first few terms of the sequences. Then he explores equivalent forms the explicit formula and finds the corresponding recursive formula.

### Explicit formulas for geometric sequences

PRACTICE PROBLEMS
Solve problems such as: The first four terms in a geometric sequence are 1/3, 1, 3, and 9. Find an explicit formula for the sequence.

### Converting recursive & explicit forms of geometric sequences

VIDEO 6:30 minutes
Sal solves the following problem: The explicit formula of a geometric sequence is g(x)=9*8^(x-1). Find the recursive formula of the sequence.

### Recursive formulas for geometric sequences

PRACTICE PROBLEMS
Find the recursive formula of a geometric sequence given the first few terms or given an explicit formula.

### Sequences word problems

PRACTICE PROBLEMS
Given a verbal description of a real-world relationship, determine the sequence that models that relationship.