Texas Instruments TI-83 PLUS - Manual (Page 185)

TI-83 Plus Sequence Graphing 182
Defining and Editing a Sequence Function
To define or edit a sequence function, follow the steps in Chapter 3 for
defining a function. The independent variable in a sequence is
n .
In Seq graphing mode, you can enter the sequence variable in either of
two ways.
•
Press „ .
•
Press y N [
N
].
You can enter the function name from the keyboard.
•
To enter the function name u , press y [
u
] (above ¬ ).
•
To enter the function name v , press y [
v
] (above − ).
•
To enter the function name w , press y [
w
] (above ® ).
Generally, sequences are either nonrecursive or recursive. Sequences
are evaluated only at consecutive integer values.
n is always a series of
consecutive integers, starting at zero or any positive integer.
Nonrecursive Sequences
In a nonrecursive sequence, the n th term is a function of the
independent variable n . Each term is independent of all other terms.