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If α and β are the roots of the equation 375 x 2 – 25x – 2 = 0, then ∑ ∑ = = ∞ → ∞ → β + α n 1 r r n 1 r n r n lim lim is equal to :

1. 116 7
2. 358 29
3. 12 1
4. 346 21

Correct answer: 12 1

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