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

A result is too large to fit the memory. Number is infinity.

You have to type:

deSolve(x''+7x'+12x=4/k and x(0)=0 and x'(0)=4/k,t,x)

Then enter. See captured image below

The calculator does not have a Computer Algebra System or CAS: It cannot handle non numerical quantities. Every letter symbol must have a value stored in it prior to being used. If no value is stored in a letter symbol, value 0 is assigned to it. Sorry.
As to calling Pi a variable, I would not got that far, even if the calculator would give me 2Pi.
TI calculators that have a CAS are the TI92 Plus, the Voyage 200 PLT, and the TI Nspire CAS, TI Nspire CX CAS.

1. Remove the keypad (for TI-Nspire) or the battery door (for TI-Nspire CAS) and remove at least 1 battery from each column of batteries. After 2-5 seconds, reinsert the batteries and turn the unit on. This will cause the unit to reboot the operating system.
2. Remove the keypad (for TI-Nspire Family or TI-Nspire CAS Touchpad) or the battery door (for TI-Nspire CAS) and remove at least 1 battery from each column of batteries. After 2-5 seconds, reinsert the batteries and LEAVE THE UNIT OFF (do not turn on and then back off). If the TI-Nspire/TI-Nspire CAS is a Clickpad, hold down [Home] [Enter] [P], and while holding these keys, press [On]. If the TI-Nspire/TI-Nspire CAS is a Touchpad, instead hold down [Doc] [Enter] [EE], and while holding these keys, press [On]. The device will boot up as in the previous reset, but will display a menu with the following options. Please try options 1, 2, 3, and 4 in that order. ** The [Home] key is located at the top right of the TI-Nspire keypad and has a picture of a house on it.

Hi flamatar25, I have the same problem and I sent a message to the technical support of Texas Instruments. I hope they can help me. Have you found any solution?

I'm afraid the TI-Nspire CAS does not support pdf files.

Cheers,
Sine Wave

You cannot do it with this calculator. It does not have a Computer Algebra System (CAS). Try a TI89 Titanium, a TI 92PLUS, a TI 200PLT or a TI-Nspire CAS.
However, they may exist other programs on education.ti.com or ticalc.org. Search these sites and you may be lucky.

Hello,
If you remove battery door, the TINspire CAS cannot be turned ON.
You may try to reset the unit by pressing the reset button on the back of the unit. If that does not solve the problem, you may try to reinstall or update the OS.

Anyway, here is what the Texas Instruments Knowledge Base has to say about reinstalling the OS. Hope it helps.

What steps are required to reinstall the TI-Nspire family operating system?

To reload the device’s OS using a computer with TI-Nspire Computer Link:
• Connect the TI-Nspire device (with the Nspire keypad) to the computer using the USB Standard A to Mini B cable.
• Open the TI-Nspire Computer Link software. The select device dialog should appear, and detect the device.
• Either drag the OS file (available in the ‘downloads’ area at education.ti.com) onto the TI-Nspire File Browser portion of the window, or click Tools -> Install OS.
To reload the device’s OS using another TI-Nspire or TI-Nspire CAS device:
• Connect the two devices using the USB Mini A to Mini B cable. The end marked A should be inserted into the sending unit, while the end marked B should be inserted into the receiving unit.
• On the sending unit, access the document chooser by pressing [Home] [7]. Once in the document chooser, press [Menu] and choose 9:Send OS…
NOTE: Users can only send an OS to a unit of the same model. Users cannot send an OS from a TI-Nspire to a TI-Nspire CAS.
Please see the TI-Nspire guidebooks for additional information.

Hello,
You should ( a suggestion) reset the OS by pressing the button on the back of the unit.

If that does not work, you may consider reinstalling the OS. The procedure as described in the TI Knowledge Base is as follows.

What steps are required to reinstall the TI-Nspire family operating system?

To reload the device’s OS using a computer with TI-Nspire Computer Link:
• Connect the TI-Nspire device (with the Nspire keypad) to the computer using the USB Standard A to Mini B cable.
• Open the TI-Nspire Computer Link software. The select device dialog should appear, and detect the device.
• Either drag the OS file (available in the ‘downloads’ area at education.ti.com) onto the TI-Nspire File Browser portion of the window, or click Tools -> Install OS.
To reload the device’s OS using another TI-Nspire or TI-Nspire CAS device:
• Connect the two devices using the USB Mini A to Mini B cable. The end marked A should be inserted into the sending unit, while the end marked B should be inserted into the receiving unit.
• On the sending unit, access the document chooser by pressing [Home] [7]. Once in the document chooser, press [Menu] and choose 9:Send OS…
NOTE: Users can only send an OS to a unit of the same model. Users cannot send an OS from a TI-Nspire to a TI-Nspire CAS.
Please see the TI-Nspire guidebooks for additional information.


Hope that helps.

Hello,
Here is what the Texas Instruments Knowledge Base has to say about reinstalling the OS. Please read it till the end.

What steps are required to reinstall the TI-Nspire family operating system?

To reload the device’s OS using a computer with TI-Nspire Computer Link:
• Connect the TI-Nspire device (with the Nspire keypad) to the computer using the USB Standard A to Mini B cable.
• Open the TI-Nspire Computer Link software. The select device dialog should appear, and detect the device.
• Either drag the OS file (available in the ‘downloads’ area at education.ti.com) onto the TI-Nspire File Browser portion of the window, or click Tools -> Install OS.

To reload the device’s OS using another TI-Nspire or TI-Nspire CAS device:
• Connect the two devices using the USB Mini A to Mini B cable. The end marked A should be inserted into the sending unit, while the end marked B should be inserted into the receiving unit.
• On the sending unit, access the document chooser by pressing [Home] [7]. Once in the document chooser, press [Menu] and choose 9:Send OS…
NOTE: Users can only send an OS to a unit of the same model. Users cannot send an OS from a TI-Nspire to a TI-Nspire CAS.
Please see the TI-Nspire guidebooks for additional information.