Casio CFX-9970G User Manual page 120

6 - 4
Matrix Calculations
Example
• 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.
k k k k k Matrix Transposition
A matrix is transposed when its rows become columns and its columns become
rows. The following is the format for matrix transposition.
Example
Obtain the determinant for the following matrix :
Matrix A =
3(Det)1(Mat)aAw
a a
11
| A | =
a a
21
a a
11
| A | = a a
21
a a
31
= a a a
11 22 33
– a
Matrix
Mat A
4 (Trn)
Mat Z
MatAns
To transpose the following matrix :
1
Matrix A = 3
5
4(Trn)1(Mat)aAw
1 2 3
4 5 6
–1 –2 0
12
= a a – a a
11 22 12 21
22
a
12 13
a
22 23
a
32 33
+ a a a + a a a
12 23 31 13 21 32
a a – a a a – a
11 23 32 12 21 33
w
2
4
6
a a
13 22 31
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