Hi, 1. The problem statement, all variables and given/known data I was asked to find the determinant of the following two matrices (please see attachment). 2. Relevant equations 3. The attempt at a solution I know that the determinant of the matrix on the left is [(-1)^(n-1)]*(n-1), but I have no idea how to formally derive that, nor prove it. And I have no idea how to find the determinant of the matrix on the right. Could anyone please guide me through?