# 代数 示例

Consider the corresponding sign chart.

Use the sign chart and the given matrix to find the cofactor of each element.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

Calculate the minor for element .

The minor for is the determinant with row and column deleted.

Evaluate the determinant.

The cofactor matrix is a matrix of the minors with the sign changed for the elements in the positions on the sign chart.

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