Solution 13060: Graphing a Non-Recursive Sequence Using the TI-83 Family, TI-84 Plus Family, and TI-Nspire™ Handheld in TI-84 Plus Mode.
How can I graph a non-recursive sequence using the TI-83 family, TI-84 Plus family, and TI-Nspire handheld in TI-84 Plus mode?
The example below shows how to graph a non-recursive sequence using the TI-83 family, TI-84 Plus family, and TI-Nspire handheld in TI-84 Plus mode. A non-recursive sequence is a sequence in which the nth term is a function of the independent variable n and each term is independent of all the other terms.
NOTE: For this example, the handheld's mode settings will need to be changed.
• Press [MODE].
• Press the [Down Arrow] key three times and then press the [Right Arrow] key three times then press [Enter] to change to SEQ mode.
• Press [CLEAR] to return to the home screen.
Example: Graph the sequence function u(n)=2n+1.
• Press [Y=] to access the Y= editor.
• Press the [Up Arrow] key then press the  key then the [Enter] key to set the nMin value equal to 1.
NOTE: nMin is smallest value of n the sequence will evaluate. To input the n variable, press the [X,T,è,n] key.
• Press  [X,T,θ,N] [+]  to set u(n) equal to 2n+1.
• For the u(nMin), leave it blank.
• Press [GRAPH] to display the graph.
Please see the TI-83 family and TI-84 Plus family guidebooks for additional information.
TI-Nspire handheld in TI-84 Plus mode users may refer to the TI-84 Plus family guidebook.