Casio Algebra FX 2.0 User Manual page 120

Matrix Inversion
u
Example To invert the following matrix :
Matrix A =
K2(MAT)b(Mat)
av(A)!) (
Squaring a Matrix
u
Example To square the following matrix :
Matrix A =
K2(MAT)b(Mat)av(A)xw
# Only square matrices (same number of rows
and columns) can be inverted. Trying to invert
a matrix that is not square produces an error.
# A matrix with a determinant of zero cannot be
inverted. Trying to invert a matrix with
determinant of zero produces an error.
# Calculation precision is affected for matrices
whose determinant is near zero.
2-8-19
Matrix Calculations
1 2
3 4
x
) w
–1
1 2
3 4
# A matrix being inverted must satisfy the
conditions shown below.
A A
The following shows the formula used to
invert Matrix A into inverse matrix A
A =
A
19990401
[OPTN]-[MAT]-[x
[OPTN]-[MAT]-[x
1 0
= A A = E =
–1 –1
0 1
a b
c d
1
d –b
–1 =
ad – bc
–c a
Note that ad – bc
]
–1
2 ]
–1 .
G 0.