Casio CFX-9970G Manuale - Pagina 17

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k k k k k Matrix Inversion

Matrix

Mat A

Mat Z

MatAns

Example

To invert the following matrix :

Matrix A =

1(Mat)aA!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 value of zero cannot be inverted. Trying to invert a matrix with

value of zero produces an error.

• Calculation precision is affected for matrices whose value is near zero.

• A matrix being inverted must satisfy the conditions shown below.

–1

A A

= A

• The following shows the formula used to invert Matrix A into inverse matrix

–1

A =

–1

A = E =

d –b

ad – bc

–c

Matrix Calculations

Note that ad – bc G 0.

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