Question about Texas Instruments TI-84 Plus Calculator

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Ti-84 ERR:MEMORY, but i think I have plenty of free memory

Hi, Trying to find the intercept on a graph. I put the equations in, the graph draws fine, but then when I hit Guess? I get the memory error. I have 24153 RAM free and 131002 ARC free....so I'm guessing its not actually a shortage of memory which is the issue....but maybe corrupted RAM? Doing the same operation on my sister's (identical) Ti-84 works fine. I upgraded to OS2.55 just in case that was the issue, but it made no difference.

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  • 6 more comments 
  • Hendrix Jan 14, 2013

    Tried the 3 suggestions below, but none made a difference - the problem persists.

  • Stevan Milanovic Jan 15, 2013

    Try to do next: you have to going into the memory men (2ND - +) and select option 2. Delete some stuff you know you don't need. If the problem still persists, 2ND - +, this time option 7. Reset the defaults. You won't lose anything, it will just reset the settings that may be causing this issue.

  • Stevan Milanovic Jan 15, 2013

    Or: Remove the four battery to reset everything. Not at all silver oxide battery

  • Stevan Milanovic Jan 15, 2013

    Finally, send to me over FixYa the mathematical problem which you have to resolve!

  • Hendrix Jan 16, 2013

    Hi Stevan, Thanks for trying to help but I think it a hardware problem - specifically reading out of RAM. I did the same problem on another Ti-84 and it all worked fine.

  • Hendrix Jan 16, 2013

    BTW, I did try all of your suggestions, plus others I have received on this site, and none of them worked.

  • Stevan Milanovic Jan 16, 2013

    Send to me over FixYa the mathematical problem which you have to resolve!

  • Stevan Milanovic Jan 16, 2013

    Adding its as this comments, please!

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If you get Memory Error its meaninig that memory is insufficient to perform the instruction or function. You must delete items from memory
before executing the instruction or function.
Recursive problems return this error; for example,
graphing the equation Y1=Y1.
Branching out of an If/Then, For(, While, or Repeat
loop with a Goto also can return this error because
the End statement that terminates the loop is never
reached.

Posted on Jan 14, 2013

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Posted on Jan 02, 2017

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SOURCE: I can't graph on my ti-84 plus silv. edition

More than likely, you've put in a number in the xmin or xmax that is not correct. Example....you put in an xmin of 10 and an xmax of -10 which would be backwards. This could also happen in the ymin or y max.

The easiest way to fix this is to press zoom 6 which wil get you back to the default graph of xmin of -10, xmax of 10 and ymin of -10 and y max of 10.

If you can't see your graph on this screen and need to change the window, just be sure the number in the min for both x & y is smaller than the number in the max. You change your window size by pressing the window button.

Posted on Aug 15, 2009

  • 7993 Answers

SOURCE: err:syntax when I try to graph with ''-''

Hello,
The calculator has two minus signs

  1. The regular MINUS sign which is used with the subtraction operation. This operation is binary, requiring two operands (two terms). In a-b, a and be are the operands (they very specific names, but I will skip this detail).
  2. The negation or change sign. This operation is called unary, requiring one operand. -a means take the negative of the number a.
These are the technicalities, in which you may not be interested. On calculators, the two operations are implemented differently, with two signs, the regular minus sign -- , and the change sign (-) usually smaller in size than the regular -- sign and raised above the main line.

Examples. Let (-) be the negation and -- the regular minus.
  • If you enter (-) 12 the TI84Plus accepts it and calculates the negative of 12.
  • If you enter 12 (-) 13 the TI protests with a syntax error
  • If you enter 12 ( (-) 13) the calculator interprets it as 12* (-13) and calculates -156.
  • If you enter --12, the calculator displays Ans--12, where Ans is the last result calculated. If Ans happens to be 0, the new result is obviously the one you are expecting. But if Ans holds a non zero value, this is incorrect.
Suppose you have to calculate X^(-2)*X^(-1/3)
You can enter it exactly as it is written above. In this case, you must use the change sign (-) in both factors.
You can also decide to use the power rules and enter the expression as X^( -2 --1/3). In this case the first minus is the negation and the second is the regular minus.

I could go on with a few more examples, but that will take us away from your present concern.

In short.
  1. If the minus sign is the leftmost (first) symbol in your function (after the Y1=) you should use the negation. Any subsequent minus should be the regular minus --
  2. If the minus sign is the first symbol in an exponent, you must use the negation. Any subsequent minus in the expression of an exponent should be the regular minus --
I hope it did not bore you death with details you do not care to know about. I do hope that it will help you prevent this type of syntax errors.

Do not forget to rate the solution

Posted on Dec 13, 2009

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Dec 04, 2010 | Texas Instruments TI-83 Plus Calculator

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1 Answer

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We are trying to graph a system of 2 equations on a TI-84 Plus but the calculator will allow only 1 of the equations to be graphed at a time i.e. only 1 of the = on the Y= screen can be highlighted at a...


Hello,
Let us use the correct the terminology: You want to draw the graphics of two unrelated FUNCTIONS on the same calculator screen. That can be done but that does not make them a system of two equations.
Since it pains you to have to reset the calculator, I will try some solutions that may work within your constraints.

Turn STATSPLOTs OFF
[2nd][STATPLOTS][4:PlotsOff] [ENTER]

Clear all lists: Will erase contents of lists.
[2nd][MEM][4:ClrAllLists][ENTER]

Draw your graphs. If the ranges of the two functions do not overlapp they may not show on the screen with the SAME window dimensions.

If it works, fine. If it does not you will have to clear the RAM.

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