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Sticky Note
A [ 5 6[ [7 8] then find the determinant of A?
  1. 2
  2. -2
  3. 3
  4. 4
Explanation

Matrix A =  

[ 5  6 ]  

[ 7  8 ]

To find the determinant of a 2×2 matrix:

det(A) = (5 × 8) - (6 × 7) = 40 - 42 = -2


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