TI-Nspire CX II 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.
Store the first matrix: type a:= with , insert a 2 x 2 matrix template with → 7: Matrix & Vector → 1: Create → 1: Matrix — in the dialog, type to set the rows and columns ( moves between the fields; the arrows change the numbers instead). Fill the entries 1, 2, 3, 1 (move between cells with ), and press .
Store the second matrix the same way, but as b ( ).
Type , press on the touchpad to leave the exponent, then , and press .
A3B=[56735457].
Storing the matrices is optional — you can type both matrix templates straight into one expression, such as ([1321])3⋅[2103], and evaluate it in one line. Named matrices earn their keystrokes when a question reuses A and B across several parts.
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.