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If 1;w;w^2 are cube root of unity and n ...

If `1;w;w^2` are cube root of unity and n is a positive integer;then `1+w^n+w^(2n)` = {3; When n is multiple of 3; 0; when n is not a multiple of 3

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Knowledge Check

  • If 1, omega,omega^(2) are cube roots of unity then the value of (2+2omega-3omega^(2))^(3) is

    A
    125
    B
    `-125`
    C
    27
    D
    `-27`
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