11 geometric sequences.notebook
September 25, 2014
Warm up 09­25
Complete the transformations worksheet and
Write the recursive formula for 2, ­6, ­14, ...
Write the explicit formula for 17, 11, 5, ... Homework questions
11 geometric sequences.notebook
September 25, 2014
11 geometric sequences.notebook
September 25, 2014
Geometric Sequences
A sequence made by multiplying by a common ratio from term to term
ex. 5, 10, 20, 40, ...
ex. 100, 50, 25, ...
Geometric Sequence ­ Recursive Rule
f(1) = ____
.
f(n) = r f(n­1), n>2
ex. 5, 10, 20, 40, ...
11 geometric sequences.notebook
September 25, 2014
Find the common ratio, give the next term, and write the recursive rule.
Find the common ratio, give the next term, and write the recursive rule.
11 geometric sequences.notebook
September 25, 2014
Geometric Sequence ­ Explicit/Closed Rule
n­1
.
f(n)= f(1) (r) Example: Write a closed rule for the sequence below
11 geometric sequences.notebook
September 25, 2014
Example: Write a closed rule for the sequence below
The first term of a geometric sequence is 2. The common ratio is ­3. Find the 8th term.
11 geometric sequences.notebook
September 25, 2014
Arithmetic/Geometric Worksheet
work with a partner
11 geometric sequences.notebook
September 25, 2014
HW 09­25
workbook pages 265 and 266