Day 3 Geometric sequences 7.3.notebook
April 01, 2014
Geometric Sequence: a sequence where the ratio "r"
of any term to the previous term is constant, r≠1
(or you're multiplying by a constant value, r≠1 )
Are the following geometric sequences...if you say yes....give "r"
1. ­4, 8, ­16, 32, ­64, ....
2. 81, 27, 9, 3,1,....
3. 4, 10, 18, 28, 40....
4. 625, 125, 25, 5, 1,...
1
Day 3 Geometric sequences 7.3.notebook
April 01, 2014
Rule to find the nth term of a geometric sequence
Example: the nth term of a geometric sequence with the first term of 3 and common ratio of 2
Now find BE CAREFUL..... Order of operation!
2
Day 3 Geometric sequences 7.3.notebook
April 01, 2014
Write a rule for the nth term of each geometric sequence
Then find (write your answer as a fraction if it's not an integer)
1. 4, 20, 100, 500
2. 152, ­76, 38, ­19,...
3. One term of a geometric sequence is Write the rule for the nth term and graph the first 6 terms of the sequence
3
Day 3 Geometric sequences 7.3.notebook
April 01, 2014
4. Given the two terms of a geometric sequence, find the rule for the nth term
find the nth rule
4
Day 3 Geometric sequences 7.3.notebook
April 01, 2014
Homework
page 454 and 455
4­12 even
15­22 all
Graph 28 and 29
39­43 all
5
Day 3 Geometric sequences 7.3.notebook
April 01, 2014
6