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If A = ⎥ ⎦ ⎤ ⎢ ⎣ ⎡ λ 10 5 1 , A –1 = α A + BI and α + β = – 2, then 4 α 2 + β 2 + λ 2 is equal to :

1. 12
2. 19
3. 14
4. 10

Correct answer: 14

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