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Roots of Unity

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Multiple Choice

If $1,\alpha, \alpha^2,.....,\alpha^{n - 1}$ be the $n^{th}$ roots of unity, then $(1-\alpha)(1-\alpha^2).....(1-\alpha^{n-1}) $

  1. $3$
  2. $0$
  3. $n$
  4. $1$
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