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Let α and β be the roots of equation x 2 – 6x – 2 = 0. If a n = α n – β n , for n ≥ 1, then the value of 9 8 10 a 2 a 2 a − is equal to :

1. 6
2. – 6
3. 3
4. – 3

Correct answer: 3

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