Determinant - Casio FX-9750G Quick Start Manual

k k k k k Determinant
The following is the format for obtaining a determinant.
3 (Det)
Example Obtain the determinant for the following matrix :
Matrix A =
3(Det)1(Mat)aAw
This display indicates determinant |A| = –9.
• 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 pro-
duces an error (Dim ERROR).
• The determinant of a 2 ! 2 matrix is calculated as shown below.
| A | =
• The determinant of a 3 ! 3 matrix is calculated as shown below.
| A | =
= a
Matrix
Mat A
Mat Z
MatAns
1 2 3
4 5 6
–1 –2 0
a a
11 12
= a a – a
11 22
a a
21 22
a a a
11 12 13
a a a
21 22 23
a a a
31 32 33
a a + a a a + a
11 22 33 12 23 31
– a a a – a a
11 23 32 12 21
Matrix Calculations
w
1 2 3 4 5 6
a
12 21
a a
13 21 32
a – a a a
33 13 22 31
6 - 4
109