Education Technology

# Knowledge Base

## Solution 31811: Graphing the Fibonacci Sequence Using the TI-83 Plus Family, TI-84 Plus Family, or TI-Nspire™ Handheld in TI-84 Plus Mode.

### How can I graph the Fibonacci sequence using the TI-83 Plus family, TI-84 plus family, and TI-Nspire handheld in TI-84 Plus mode?

In a Fibonacci sequence the first two terms are 1 and 1. Each succeeding term is the sum of the two immediately preceding terms.

Follow the procedure below to graph the Fibonacci sequence:

1) Press [MODE].
2) Arrow down to Func.
3) Arrow over to SEQ and press [ENTER].

5) Press [Y=].
6) For nMin=, input [1].
7) For u(n)=, input [2ND] [u] [(] [X,T,q,n] [-] [1] [)] [+] [2ND] [u] [(] [X,T,q,n] [-] [2] [)].
8) For u(nMin)=, input [2ND] [{] [1] [,] [1] [}].

9) Press [GRAPH].
10) To adjust the window, press [ZOOM] and press 6: ZStandard.

11) Press [2ND] [TBLSET] to setup the table options.
12) Input 1 for TblStart= and 1 for Tbl=.
13) Press [2ND] [QUIT].
14) Press [2ND] [TABLE] to see the table of n and u(n).

Please see the TI-83 Plus family and TI-84 Plus family guidebooks for additional information.

Please Note: TI-Nspire users may refer to the TI-84 Plus family guidebook.