Matrix Calculations (Matrix) - Casio fx-991ZA PLUS II User Manual

Matrix Calculations (MATRIX)

Use the MATRIX Mode to perform calculations involving matrices of up to
3 rows by 3 columns. To perform a matrix calculation, you first assign data
to special matrix variables (MatA, MatB, MatC), and then use the variables
in the calculation as shown in the example below.
Example 1: To assign
perform the following calculations:
+ (MatA+MatB)
1. Press (MATRIX) to enter the MATRIX Mode.
2. Press (MatA)
• This will display the Matrix Editor for input of the elements of the 2 × 2
matrix you specified for MatA.
3. Input the elements of MatA: 2
4. Perform the following key operation:
(MATRIX)
• This will display the Matrix Editor for input of the elements of the 2 × 2
matrix you specified for MatB.
5. Input the elements of MatB: 2
6. Press to advance to the calculation screen, and perform the first
calculation (MatA×MatB):
(MATRIX)
• This will display the MatAns screen with the calculation results.
to MatA and
(2×2).
1 1
(Data) (MatB)
1
(MatA) (MATRIX)
65
to MatB, and then
× (MatA×MatB),
(1) "A" stands for "MatA".
1 .
(2×2).
1 2 .
(MatB)
(X =) 1
3
.