Casio fx-9750G PLUS User Manual Page 121

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93
The two matrices must have the same dimensions in order to be added or
subtracted. An error occurs if you try to add or subtract matrices of different
dimensions.
For multiplication, the number of columns in Matrix 1 must match the number of
rows in Matrix 2. Otherwise, an error occurs.
•You can use an identity matrix in place of Matrix 1 or Matrix 2 in the matrix
arithmetic format. Use the matrix command menu’s Identity command (1)
to input the identity matrix.
Example 3 To multiply Matrix A (from Example 1) by a 2 × 2 identity matrix
1(Mat)aA*
6(g)1(Iden)cw
Number of rows and columns.
kk
kk
k Matrix Scalar Multiplication
The following is the format for calculating a matrix scalar multiplication, which
multiplies the value in each cell of the matrix by the same value.
Scalar value Matrix
Mat A
k w
Mat Z
MatAns
Example Calculate the product of the following matrix using a multiplier
value of 4 :
Matrix A =
12
34
e1(Mat)aAw
kk
kk
k Determinant
Matrix
Mat A
3 (Det) w
Mat Z
MatAns
Matrix Calculations 6 - 4
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