9. Formal Definition
“A function whose domain is the set
of positive integers.”
For example:
The sequence tn = 4n – 2
- can be thought of as The function t(n) = 4n – 2
(where n is a + integer)
10. Graphing Sequences
Write terms as ordered pairs and plot.
Ex: 1, 4, 7, 10, …
has points (1, 1), (2, 4), (3, 7), (4, 10)
Notice n (the term number) is the x!
Arithmetic – points lie on a line
Geometric – points lie on an
exponential curve