Casio ALGEBRA FX 2.0 Manual Calculations Uživatelský manuál stáhnout pdf (Strana 68)

19990401

uMatrix Inversion [OPTN]-[MAT]-[x

–1

]

Example To invert the following matrix :

Matrix A =

K2(MAT)b(Mat)

av(A)!) (x

–1

)

uSquaring a Matrix [OPTN]-[MAT]-[x

]

Example To square the following matrix :

Matrix A =

K2(MAT)b(Mat)av(A)xw

2-8-19

Matrix Calculations

#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.

#A matrix being inverted must satisfy the

conditions shown below.

The following shows the formula used to

invert Matrix A into inverse matrix A

–1

A A

–1

= A

–1

A = E =

1 0

0 1

A =

a b

c d

Note that ad – bc

–1

ad – bc

d–b

–c a

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