Casio fx-9860G SD - Manual (Page 135)

20050401
u Determinant [OPTN]-[MAT]-[Det]
○ ○ ○ ○ ○
Example Obtain the determinant for the following matrix :
1 2 3
Matrix A = 4 5 6
–1 –2 0
K 2(MAT)3(Det)1(Mat)
av(A)w
u Matrix Transposition [OPTN]-[MAT]-[Trn]
A matrix is transposed when its rows become columns and its columns become rows.
○ ○ ○ ○ ○
Example To transpose the following matrix :
1 2
Matrix A = 3 4
5 6
K 2(MAT)4(Trn)1(Mat)
av(A)w
2-8-18
Matrix Calculations
# Determinants can be obtained only for square
matrices (same number of rows and
columns). Trying to obtain a determinant for a
matrix that is not square produces an error.
# The determinant of a 2 × 2 matrix is
calculated as shown below.
# The determinant of a 3
× 3 matrix is calculated
as shown below.
| A | =
a
11
a
12
= a
11
a
22
– a
12
a
21
a
21
a
22
= a
11
a
22
a
33
+ a
12
a
23
a
31
+ a
13
a
21
a
32
– a
11
a
23
a
32
– a
12
a
21
a
33
– a
13
a
22
a
31
a
11
a
12
a
13
a
21
a
22
a
23
a
31
a
32
a
33
| A | =