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If `1,alpha_1,alpha_2,alpha_3,.........,alpha_(3n)` be the roots of the eqution `x^(3n+1) - 1 =0`, and w be an imaginary cube root of unity, then `((w^2-alpha_1)(w^2-alpha_2)....(w^(3n)-alpha_(3n))) /((w-alpha_1)(w2-alpha)....(w-alpha_(3n)))`

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