shreyas varma last edited by
Harshal Patil last edited by Harshal Patil
@shreyas-varma first thing is
must be a determinant. I think there is sum mistake as they hav given it as matrix.
For d soln: open det using 3rd row. U will directly get
U will get
in terms of and
So the ques reduces to summation of 2 counted 31 times. So answer is