Question about Texas Instruments TI-89 Calculator

Ad

Matrix multiplication is defined only when the width of the first matrix is equal to the height of the second. You can multiply a 2x2 matrix by a 1x2 matrix or multiply a 2x1 matrix by a 2x2 matrix, but you cannot multiply a 2x2 matrix by a 2x1 matrix.

Posted on Jun 13, 2011

Ad

If a is the name of a PIC, GDB, MAC, FIG, etc., a+1 is invalid. Use a different variable name in the expression or delete the variable.

Apr 22, 2015 | Texas Instruments TI-89 Graphing Calc...

One way is to multiply the quantity by itself.

Another is to raise it to the second power using ^ (just above the divide key).

You can also take it's logarithm, double it, then take the antilog :-)

Another is to raise it to the second power using ^ (just above the divide key).

You can also take it's logarithm, double it, then take the antilog :-)

Apr 27, 2014 | Texas Instruments TI-89 Calculator

Sorry, but your matrices do not make sense.If you multiply a matrix by a scalar the resulting (product) matrix has exactly the same structure as the one you multiplied : (mXn) times a yields another (mXn) matrix.

Be it as it may, when you multiply a matrix by a scalar, you obtain the product by multiplying every element of the original matrix by the scalar.

Here is a screen capture showing the multiplication of a 2X2 matrix by a scalar.

Note: I have noticed that screen captures I insert in my answers are sometimes deleted (by FixYa?). So if you do not see a picture it has nothing to do with me.

Be it as it may, when you multiply a matrix by a scalar, you obtain the product by multiplying every element of the original matrix by the scalar.

Here is a screen capture showing the multiplication of a 2X2 matrix by a scalar.

Note: I have noticed that screen captures I insert in my answers are sometimes deleted (by FixYa?). So if you do not see a picture it has nothing to do with me.

Dec 11, 2011 | Office Equipment & Supplies

You'll get the same error if you try to divide two matrices with real numbers. The TI-89 doesn't allow you to divide a matrix by another. However, you can multiply a matrix by the reciprocal of the other.

For example, to calculate A/B, calculate instead A*B^-1 . Makes sure you use the (-) key just to the right of the decimal point key to put in the negative sign before the "1".

For example, to calculate A/B, calculate instead A*B^-1 . Makes sure you use the (-) key just to the right of the decimal point key to put in the negative sign before the "1".

Sep 10, 2011 | Texas Instruments TI-89 Calculator

The distributions do not exist on the TI 89 Titanium. But you can download an application from the education.ti.com website. It is called tistale.89x. Here is the link to it.

May 27, 2011 | Texas Instruments TI-89 Calculator

Hi kelsers,

You need to**re-install** your calculator's **OS**. After this process your **Ti 89 Titanium** will operate properly. If you do the process below make sure you use __new batteries__.

You need to

**Warning!!! **If you do this procedure make sure that your computer and, calculator are connect. Use **Ti Connect **software and, make sure you can install the **OS** on the calculator without any **interruption**.** At any time even at the very beginning of this process, if your computer or, calculator gets interrupted or you have a power failure during the installation of the OS, your calculator will be destroyed.** So not attempt this procedure during a thunder storm.

You can use the **Ti OS Downloader** but, you will have no idea what **OS** is stored by the **Ti OS Downloader.** So, I suggest following my instructions and, installing the newest **Ti 89 Titanium OS 3.10v.Procedure to installing the newest Ti 89 Titanium OS 3.10v.**You can also get the latest copy of

**Link your computer and calculator with the USB cable or, Direct Black Link cable that came with the calculator.**Remove one of the AAA batteries.

Next, drag the **Ti 89 Titanium OS 3.10v.** that you copied earlier to **"My Documents \ My TI Data \ Downloads"** out of that folder and, drop it in the **"Ti Connect"** icon on the desktop. Next the **OS Downloader Warning** will pop-up. Click, **"OK"** to continue and, the new **OS** will begin to install. The **Ti Device** window should pop up and, click on to the port where your **Ti 89 Titanium** is located, USB1 cable or Direct Black COM1. Just click, **"Select"** and, the **OS** will continue to download. Upon completion the newest **Ti 89 Titanium OS 3.01v.** will be installed.

Jan 10, 2011 | Texas Instruments TI-89 Calculator

Having gone over a month with no response, I assume this is no longer a problem.

Jun 26, 2010 | Texas Instruments TI-89 Calculator

If you connect calculator to computer using Ti connect device explorer you might be able to see what files are on the calculator. I don't know if you downloaded from the web but, 3rd party programs and shells tent to miss up the calculator. This would able you to delete out possible problems which could be re installed later.

Sep 22, 2009 | Texas Instruments TI-89 Calculator

Hello,

The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.

Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix

The matrix used in the exemple is

a_11=2 a_12=1 a_21=1 a_22=2

Here is the link to download the manual and the appendix

http://support.casio.com/manualfile.php?rgn=1&cid=004001004

Hope it helps

The error may be due to the key you used to signifie inverse. It says in the manual that you should use the key x^-1 not the one used to input general powers.

Here is screen capture from the Appendix to the manual. The picture shows the sequence of keys to press to obtain the inverse of a 2x2 matrix. It is taken from page 41 of Appendix

The matrix used in the exemple is

a_11=2 a_12=1 a_21=1 a_22=2

Here is the link to download the manual and the appendix

http://support.casio.com/manualfile.php?rgn=1&cid=004001004

Hope it helps

Jul 13, 2009 | Casio FX-115ES Scientific Calculator

Hello,

The so-called (2x1) matrix is not a matrix. It is a vector.

Hope it helps.

The so-called (2x1) matrix is not a matrix. It is a vector.

Hope it helps.

Apr 26, 2009 | Texas Instruments TI-89 Calculator

May 21, 2014 | Texas Instruments TI-89 Calculator

Feb 17, 2014 | Texas Instruments TI-89 Calculator

401 views

Usually answered in minutes!

×