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I Determinant of a 4x4 matrix

  1. Apr 2, 2016 #1
    I know row reduction methods are the best way to calculate the determinant of large matrices. I was wondering if you can use the appended matrix method to calculate the determinant of a 4x4 by appending the matrix with the first 3 columns. There should be n! terms, but I only get 8 instead of 24.
  2. jcsd
  3. Apr 2, 2016 #2


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    I don't think the appended matrix method works for larger than 3x3 matrices for that reason.

    The only other way I know for calculating the determinant is expansion by minors, which is n! terms, in principle, but it's a lot easier than it sounds if you have a lot of zeroes and ones.
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