TI-84 Plus CE field manual for IB Math
Matrix arithmetic
Store two matrices and evaluate a matrix expression such as A3B on the calculation screen.
Given A=[1321] and B=[2103], find A3B.
Press to open MATRIX, move to EDIT, choose 1:[A], set the dimensions to 2 x 2, and fill the rows 1, 2 and 3, 1, pressing after each entry.
Go back to MATRIX → EDIT, choose 2:[B], and enter the second matrix the same way.
Return to the home screen with . Open the matrix menu with and press to paste [A]. Press for the cube, press to leave the exponent, paste [B] the same way ( ), and press .
A3B=[56735457].
Your turn
Work each one on your calculator, then check the answer.
- 1
Given A=[2111] and B=[1230], find A3B.
- 2
Given A=[12−10] and B=[3012], find A3B.
- 3
Given A=[0121] and B=[2310], find A3B.