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.