Math 114 - Working with Matrices on the TI-84+ Page 4 of 8 From §6.3 we did #44, p. 577 by hand. Here it is again, done on the TI-84+, IF WE WANTED TO CHECK OUR WORK! Find A-1, if it exists: 1 5 10 0 1 6 1 4 3 A ªº «» «» «»¬¼ Enter matrix A into your TI -84+ as a 3 × 3 matrix. inverse To find A-1, go to the home screen,. Step 1: To access the matrix features of your calculator, you need to press the shift key then the inverse key. This takes you to the matrix feature of the calculator, which looks like: Step 2: Press the right arrow key two times until EDIT is highlighted. Step 3: Select a matrix by using the down arrow until the desired matrix is highlighted. (Here we will use matrix [A], so we do not need to.
Entering a Matrix: Press [2nd][MATRX] (TI-83+/84) or [MATRX] (TI-83) to see a screen with a menu that looks as shown in screen 1. The dimensions on the right of the names show that there is a matrix stored there. To enter a matrix scroll to [EDIT] then down to the matrix name you want, press [ENTER]. You are then asked for the size of the.. You are here: TI-84 Plus CE eGuide > Graphing Calculator > TI-84 Plus CE Getting Started Guide > Working with Matrices.. You can enter matrices using the matrix editor on your graphing calculator. For example, you can perform the following operations on matrices: • Addition • Inverses • Division • Multiplication • Elementary Row.