What is the different between ti-86 and ti-83

[SOLVED by OP]:
Just needed to use a different wire.

https://www.google.com/search?q=Texas+Instruments+TI-84+Plus+Calculator+freezes+when+connected+to+my+computer

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The standalone version of the OS for the TI84Plus/TI84Plus SE are not for TI-Nspire with TI84 keyboard. The 94 Plus part of the TI-Nspire is updated when you update the OS of the TI-Nspire. The version numbers are different.
To update you TI84 portion of the TI-Nspire, update the OS for the TI-Nspire. Thy are now at Version 3.2.3.1233

The standalone version of the OS for the TI84Plus/TI84Plus SE are not for TI-Nspire with TI84 keyboard. The 94 Plus part of the TI-Nspire is updated when you update the OS of the TI-Nspire. The version numbers are different.
To update you TI84 portion of the TI-Nspire, update the OS for the TI-Nspire. Thy are now at Version 3.2.3.1233

You can download the TI-30Xa guidebook from the manufacturer's web site at
http://education.ti.com/calculators/downloads/US/Guidebooks/Detail?id=6132

The TI-30Xa replaced the TI-30X within a year. The only enhancement was the added Constant key.

The TI-30XII, introduced about five years later, is a significantly different calculator, incorporating, among other things, a two-line display.

The function avgRC( calculates forward-difference quotients and the nDeriv( calculates central-difference quotients. Take your pick. You can also use the d( differentiate function.
You can also create a small program or function that gets a function as argument, along with the variable and the step and returns one of the difference quotients. (central, forward, or backward).

The TI-83 doesn't have such a function built-in. Use the relationship logb(x) = log(x)/log(b) = ln(x)/ln(b).

I had the same problem when I got my first 89, even though it's really a feature and not a problem.

Press the diamond key then enter to get your answer, and it will give you the decimal answer instead of the exact answer like you have been getting. Hope this helps...

Hello ronsky123. I sorry no parts from TI for TI-82. You may find one for sale by an indivdual or one with a different malfunction & put 1 + 2= 1. Good Luck.

kinda. The TI-85 programs differently, lacks a table feature, is not upgradable, has redefinable keys, has a larger screen, is smaller, energy efficient, TI-86 semi-compatible, and is older.
The TI-84+ has archive memory, flash-upgradable, FSTN (clearer) screen, 16*8 screen, USB On-The-Go compliant, almost a centimeter longer, assembly language support, and a tad bit faster.

TI-82: $89
TI-83 Plus: $79-99
Free TI-85: $0
TI-84 plus: $119.99
TI-84+SE: $129-139
TI-89 Titanium: $149

Hello fezzaniaahmed. Im sorry to inform you no parts from TI for the TI-82. You may find another TI-82 with a different problem and 1+2=1. Good luck.