Finding sequences on the TI-89 Titanium Calculator?

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SUMMARY

The TI-89 Titanium calculator can be utilized to derive formulas from input sequences of numbers. Users can input sequences like (1, -1/3, 1/9, -1/27, 1/81) and expect the calculator to provide a corresponding formula, such as (-1/3)^(n-1). While the calculator can assist in identifying patterns, there are inherent limitations due to the infinite possibilities of sequences. Techniques such as analyzing common ratios and differences are recommended for simplifying the process of finding formulas.

PREREQUISITES
  • Understanding of sequences and series
  • Familiarity with the TI-89 Titanium calculator functions
  • Basic knowledge of mathematical patterns and formulas
  • Ability to interpret mathematical notation
NEXT STEPS
  • Explore the TI-89 Titanium calculator's sequence functions in detail
  • Learn about mathematical sequences and series analysis techniques
  • Research methods for identifying common ratios and differences in sequences
  • Study polynomial regression techniques for sequence formula derivation
USEFUL FOR

Mathematicians, educators, students, and anyone interested in utilizing the TI-89 Titanium calculator for sequence analysis and formula derivation.

jonathan1
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Can someone guide me toward using my TI-89 Titanium calculator for sequences?

I would like to be able to PUT IN a sequence of numbers and have it GIVE ME the formula. Not vice versa please. Thanks.
 
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I would suggest there must be some limit to this - there are probably infinite answers to "guess the next term".

For instance, what do you think is the next term for 1, 2, 4, 8, 16?
 
What I mean is that I'd like to put in a sequence of numbers such as (1, -1/3, 1/9, -1/27, 1/81,...) and have it give me a formula like (-1/3)^n-1
 
So you want a simplest formula, for some values of simplest? I am not sure of an easy way to do this, except perhaps look for things like common ratios / differences, perhaps taken over several steps?
 

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