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Let A be a 2 × 2 matrix with real entries such that zero is the only solution of the equation det(A -xI) = 0. Then
1. A^2 = 0
2. A = I
3. A^2 = A
4. A = 0

Let A be a 2 2 matrix with real entries such that zero is the only solution of the equation detA xI 0 Then 1 A2 0 2 A I 3 A2 A 4 A 0 class=


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