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Argument must be a variable name - Texas Instruments TI-89 Calculator

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Posted on Jan 02, 2017

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SOURCE: Argument error whenever I type equations with variables.

Perhaps you have some data stored in the x variable.

With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

If you find x in the list, highlight x, then press F1, and then select delete.

Now it should work like normal.

Posted on Nov 07, 2009

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1 Answer

Argument checking!


The calculator does have several error message concerning the argument. For the Request( command the syntax is
Request(Message, VarName)
What you type is stored as a string. It is only after you try to convert it to a value that the calculator looks at its content.
Here is an example where the variable VarName is x
Request ("Variable x", x)
I enter a complex number, manipulate it mildly with no apparent problem. However when I try to convert it to a numerical expression, and store it in the variable x, y, theta, I get a message Error non-real result.
8c34d722-dbfe-4986-87f4-909da5e8317e.png

Jan 13, 2014 | Texas Instruments Voyage 200 Calculator

1 Answer

How can i solve integrals with ALGEBRA FX 2.0 PLUS


The syntax for the evaluation of definite integrals (integrals with boundary limits) is as shown on the screen capture below.

$ (function , variable , lower bound, upper bound)
By default the name of the dummy variable is x. If you use another name, the variable must appear as an argument of the function, and as variable.

3_14_2012_11_39_12_pm.png

Mar 13, 2012 | Casio Algebra FX 2.0 Calculator

1 Answer

Hey I am trying to use the DeSolve funtion on Texas TI-nspire cas. I insert: DeSolve(2x=0, x) and I get a error message. What am i doing wrong


deSolve( ) solves differential equations. The general syntax is deSolve(1stOR2ndOrderODE, Var, depVar). The first argument must be a first order or second order differential equation, the second argument is the independent variable, and the third is the dependent variable (the name of the function you are trying to obtain.)
Your command does not have a differential equation, and it does not have the dependent variable.

Sep 18, 2011 | Texas Instruments TI-89 Calculator

1 Answer

I am trying to get the answer to an indefinite integral. I keep getting "argument error" For example, I type in after the integral sign: (sin(x),x) and get the error message. Help!


You already have something stored with the name x. Either get rid of it or use a different name for the variable of integration.

You can see what variables you have stored by pressing 2ND [VAR-LINK] (the minus key).

Feb 02, 2011 | Texas Instruments TI-89 Calculator

1 Answer

How do I put a limit in my TI-89 with it saying 'to few arguments'?


Make sure you give it the appropriate number of arguments. The limit() function takes three or four arguments.
  1. The expression. For example, sin(x)/x
  2. The variable. For example, x
  3. The point at which the limit is to be taken. For example, 0
  4. (optional) The direction from which the limit is to be approached, negative for from the left, positive for from the right, 0 for both. Defaults to zero if not given.

Sep 08, 2010 | Texas Instruments TI-89 Calculator

3 Answers

Argument error whenever I type equations with variables.


Perhaps you have some data stored in the x variable.

With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

If you find x in the list, highlight x, then press F1, and then select delete.

Now it should work like normal.

Oct 22, 2009 | Texas Instruments TI-89 Calculator

2 Answers

Stat list keeps showing domain error ti 89


Hello,
In Home folder, press [2nd][F1] (F6) [2:NewProb][ENTER][ENTER]. This will clear the calculator of old junk.
You get a domain error if for exemple a function takes integer arguments but you are feeding it decimals, or like the square root and ln which need positive arguments and you give them negative values.
Instead of looking at all the old junk (variables, functions, configuration settings in stat plots incompatible with your new plots) to find the offending ones, it is more efficient to clear the slate (NewProb) and start afresh.

Hope it helps.

Oct 13, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Hi so i have to use the cos, sin , and tan functions on my ti-89 but when i press enter it says "Error: protected memory violation"... i need to use those keys for a precalc test tomorrow and i dont know...


Hello,
My guess is that you entered as variable of the the functions, the name of a variable that is reserved (system variable, app variable ). In Home screen press [F6: Clean up][ Clear a-z] [ENTER] and stick with x as function argument.
Hope it helps.

Oct 02, 2009 | Texas Instruments TI-89 Calculator

1 Answer

Programs with variable number of arguments


To start points and lines are not shapes, and a triangle is not representable with a single function, therefore you need a function to draw shapes , given a number of points as parameters, and one to draw math functions (lines etc.).

Here is an example: Draw Line, Ellipse, Polygon ...

From website above, here is script in JS:

"<script type="text/javascript">
<!--
function myDrawFunction()
{
jg_doc.setColor("#00ff00"); // green
jg_doc.fillEllipse(100, 200, 100, 180); // co-ordinates related to the document
jg_doc.setColor("maroon");
jg_doc.drawPolyline(new Array(50, 10, 120), new Array(10, 50, 70));
jg_doc.paint(); // draws, in this case, directly into the document

jg.setColor("#ff0000"); // red
jg.drawLine(10, 113, 220, 55); // co-ordinates related to "myCanvas"
jg.setColor("#0000ff"); // blue
jg.fillRect(110, 120, 30, 60);
jg.paint();

jg2.setColor("#0000ff"); // blue
jg2.drawEllipse(10, 50, 30, 100);
jg2.drawRect(400, 10, 100, 50);
jg2.paint();
}

var jg_doc = new jsGraphics(); // draw directly into document
var jg = new jsGraphics("myCanvas");
var jg2 = new jsGraphics("anotherCanvas");

myDrawFunction();

//-->
</script>"

Oct 25, 2008 | Computers & Internet

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