Question about Texas Instruments TI-89 Calculator

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Posted on Jan 02, 2017

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

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.

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.

Jan 13, 2014 | Texas Instruments Voyage 200 Calculator

You have to download the next program for multivariable function limit from:

http://www.technicalc.org/fpw/lim.html

See captured image below

http://www.technicalc.org/fpw/lim.html

See captured image below

Jul 31, 2013 | Texas Instruments TI-89 Calculator

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.

$ (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.

Mar 13, 2012 | Casio Algebra FX 2.0 Calculator

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.

Your command does not have a differential equation, and it does not have the dependent variable.

Sep 18, 2011 | Texas Instruments TI-89 Calculator

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).

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

Feb 02, 2011 | Texas Instruments TI-89 Calculator

Make sure you give it the appropriate number of arguments. The limit() function takes three or four arguments.

- The expression. For example, sin(x)/x
- The variable. For example, x
- The point at which the limit is to be taken. For example, 0
- (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

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.

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

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.

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

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.

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

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>"

Here is an example:

From website above, here is script in JS:

"<script type="text/javascript">

<!--

function myDrawFunction()

{

jg_doc.setColor("#00ff00");

jg_doc.fillEllipse(100, 200, 100, 180);

jg_doc.setColor("maroon");

jg_doc.drawPolyline(new Array(50, 10, 120), new Array(10, 50, 70));

jg_doc.paint();

jg.setColor("#ff0000");

jg.drawLine(10, 113, 220, 55);

jg.setColor("#0000ff");

jg.fillRect(110, 120, 30, 60);

jg.paint();

jg2.setColor("#0000ff");

jg2.drawEllipse(10, 50, 30, 100);

jg2.drawRect(400, 10, 100, 50);

jg2.paint();

}

var jg_doc = new jsGraphics();

var jg = new jsGraphics("myCanvas");

var jg2 = new jsGraphics("anotherCanvas");

myDrawFunction();

//-->

</script>"

Oct 25, 2008 | Computers & Internet

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