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Subject:  Linear Algebra

Inverse of [[4, 7], [2, 6]]

Check that the determinant is non-zero, then apply the 2×2 inverse formula.

Answer [[0.6, -0.7], [-0.2, 0.4]]

Solution

  1. Matrix [[4, 7], [2, 6]]
  2. Determinant det = 10
  3. Method Augment with the identity, then Gauss-Jordan eliminate.
  4. Inverse [[0.6, -0.7], [-0.2, 0.4]]

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