 Hello friends, welcome to the session. I am Valka. We are going to discuss determinants. A given question is let A be a non-singular square matrix of order 3 cross 3. Then determinant of a joint of A is equal to A that is determinant of A be square of determinant A, cube of determinant A and B that is 3 into determinant A. Now let's start with the solution. The basic idea behind the question is if A is a non-singular square matrix of order n then determinant of a joint of A equal to determinant of A to the power n minus 1. Now here we see that our order that is n is 3 so n equal to 3 so determinant of a joint of A equal to determinant of A to the power 3 minus 1. This gives us determinant of A squared therefore B which is square of determinant A is the right answer. Hope you understood the solution and enjoyed the session. Thank you.