Recursive Formula
Presentation
•
Mathematics
•
9th - 10th Grade
•
Hard
Joseph Anderson
FREE Resource
8 Slides • 4 Questions
1
Arithmetic and Geometric Sequences
2
A recursive formula names the first term (or any other term) and how to get from one term to the next.
3
4
an= the term we are looking for
an-1= the previous term
d = common difference
Recursive Formula: an=an-1 + d
Notes Continued:
5
6
Multiple Choice
Given the sequence 2, 8, 14, 20, 26, ... What is the common difference?
2
4
6
8
7
Multiple Choice
Write the recursive formula for 6, 17, 28, 39, 50....
an=an-1+11
a1=6
an=an-1-4
a1=6
an=an-1+9
a1=6
an=an-1+6
a1=6
8
9
10
11
Multiple Choice
What is the common ratio for the sequence:
28, 14, 7, 3.5...
2
1/2
-14
-7
12
Multiple Choice
Write a recursive formula for the following sequence:
16,8, 4, 2,...
a1=16
an=an-1 (2)
a1=16
an=an-1 (1/2)
a1=16
an=an-1 + (1/2)
a1=16
an=an-1 + (2)
Arithmetic and Geometric Sequences
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