prove that determinant of cofactors of a given matrix A is equal to square of determinant of m

HIMALAY JORIWAL

prove that determinant of cofactors of a given matrix A is equal to square of determinant of matrix A

Deepak Aggarwal

There is something missing in the question and that is the order of determinant. I might be 3 i suppose. then use

| Adj A | = | A | ^n-1 where n is the order of determinant.

Here | Adj A | is the determinant formed by cofactors. Remember | A^T | = | A |