Minors and cofactors of a matrix
Definition.Minor Mij to the element aij of the determinant of n order called the determinant of the (n - 1)-th order, derived from the original determinant by deleting the i-th row and j-th column.
Example 1.Find the minors of matrix A
Definition.Cofactor Cij to element aij of determinant is number
Cij = (-1)i + j · Mij
Cofactors of matrix - properties
Example 2.Find the cofactorsof matrix A
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