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  1. E

    Determinant of matrix

    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.
  2. E

    Determinant of matrix

    Thx for your reply, but I can't see how u get to this solution.. Can u show me the process? Thanks again!
  3. E

    Determinant of matrix

    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.
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