Lesson 12.3 Part I Geometry
Sequences
Algebra II
Spring 2012
Agenda
1.
2.
3.
4.
Faux Quiz
Homework review and check
Lesson 12.3, part 1 Geometric Sequences
Homework: On pages 814-817, do exercises
1-4, 6,9,15, 18, 21, 28, 31, 34, 39, 40 and 46.
Faux Quiz
1. Given the sequence 2, 11, 20, 29, 38….
a) Tell whether it is arithmetic
b) Why or why not
c) Find a rule
2. Find
8
𝑖=1
(3𝑖 − 1)
Geometric Sequences
Listed below are a few Geometric sequences.
• Describe the sequence.
• Find the 6th term
• Find the rule.
• Check the rule with the first 4 terms of the
sequence.
• Graph the sequence
a) 3, 6, 12, 24, 48
b) 64, 32, 16, 8, 4
Geometric Sequences
• What do you notice about all of the sequences
(what do they have in common?)?
• What do you notice about all of the graphs?
• How can you recognize an geometric
sequence?