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If omega be a complex cube root of unit...

If `omega` be a complex cube root of unity, then the number `(1-omega-omega^2)^3+(omega-1-omega^2)^3+(omega^2-omega-1)^3` is: a. Divisible by 3 but not by 8 b. Divisible by 8 but not by 3 c. Divisible by both 3 & 8 d. none of these

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