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If alpha, beta and gamma are the roots o...

If `alpha, beta and gamma` are the roots of the equation `x^3-3x + 1 = 0` then (A) `prod(alpha+1)=-3` (B) `sum(alpha+1)=0` (C) `sum(alpha+1)(beta+1)=-3` (D) `sum alpha^2=6`

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