That makes it invertible

How can you know when a matrix is invertible? Here’s a video from a college friend of mine that answers the question.

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2 comments on “That makes it invertible
  1. So THIS is how Matt DeLong is spending his sabbatical from Taylor.

  2. makc says:

    It is not obvious at all why you need to calculate determinant. You could tell them to see if zero is on the line (2×2 case) or plane (3×3) formed by columns.

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