Alright, so, if I have a determinant with n=4, i add all the rows to the first and i get (4-n +4-n +4-n +4-n), so, it's 0.
Is there any other process?
Thank you.
How can I get the determinant of this matrix?
1-n 1 ....1 1
1 1-n ...1 1
. . . .
. . . .
1 1 .... 1 1-n
I think that the answer is 0 but... why?
Thank you.