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Cube Root of Unity

Note: 

  • w3 = 1 and 1 + w + w2 = 0
  • It can be easily proved that
    1 + wn + w2n = 3         (n is a multiple of 3)
    1 + wn +w2n = 0          (n is an integer, not a multiple of 3)
Cube Root of Unity Examples
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