How to Solve Equations using TI-89 TIT Calculator?

  • Context: High School 
  • Thread starter Thread starter 2Xist
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Discussion Overview

The discussion revolves around the use of the "Solve" function on the TI-89 TIT calculator, specifically addressing an issue encountered when inputting equations. Participants explore the correct syntax for solving equations and the resulting errors from incorrect inputs.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant reports receiving a "memory error" when using the input "solve(20=X(2),X)" and requests assistance from others.
  • Another participant suggests correcting the input to "solve(20 = 2*x,x)" to avoid the error.
  • A third participant confirms that the corrected input worked for them and expresses confusion about why "X(2)" caused an issue.
  • A later reply explains that using "x(2)" is interpreted by the calculator as a function of a variable, which has not been defined, leading to the error.

Areas of Agreement / Disagreement

Participants generally agree that the input format is crucial for the calculator's function, but there is some uncertainty regarding the interpretation of "X(2)" and whether it should be accepted as valid input.

Contextual Notes

Limitations include potential misunderstandings of function notation and the calculator's interpretation of inputs, which may vary among users.

Who May Find This Useful

Users of the TI-89 TIT calculator, particularly those seeking assistance with solving equations and understanding input syntax.

2Xist
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Hi everybody,

i was using the " Solve( " function in TI-89 TIT (home) and i inserted the function (* THIS IS EXACTLY WHAT I TYPED IN *) :::::

solve(20=X(2),X)

i mean.. it should be 10 right?
but like it came up with the " memory error"

* I DID RESET MEMORY AND TRIED REINSTALLING OS <--lol
but none worked...

PLEASE TRY ON YOUR OWN CALCULATORS AND PLEASE HELP!

AGAIN PLEASE POST YOUR OWN RESULTS AFTER TRYING THE SAME EXACT EQUATION!
 
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the problem is with your input. Try:

solve(20 = 2*x,x) and it should work just fine.
 
lol it worked !
thank you so much! lol
so was it just my calculator or did it happen to yours too??
i don't know know why i can't put X(2) when the brackets means multiplication as well...
 
I received the error as well. When you enter x(2) the 89 thinks that you are treating x as a function of a variable when that variable is equal to the value 2, but you have not defined the function x. That is why you received the error. The TI-89 is a very smart calculator, so you have to be especially conscious of how you input.
 

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