Question about Texas Instruments TI-89 Calculator

# Calculate inverse module

How do you calculate AN INVERSE of a module in ti 89. eg inverse of 20 module 79

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• Texas Instru... Master

Hello,
The TI 89 cannot calculate the inverse modulo, but you can enter a program that can do that. I found a link to such program. Here it is.

http://www.cartesionline.it/materiali/algebra_numb_theory.cfm

Hope it helps.

Posted on Sep 13, 2009

• k24674 Sep 13, 2009

By the way, the answer to the specific question you asked is 4. While researching solution, I found out that may HP49g+ has the algorithm.

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Posted on Jan 02, 2017

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Look at the last two commands on the screen capture.

Hope it helps
Thanks for using FixYa

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