If ω is an imaginary cube root of unity, then the value of (2 + ω) (2 - \omega^2) + 2 (3 - ω) ( 3 - \omega^2 + ..... + (n-1) (n - ω) ( n - \omega^2) is

Correct Answer is : n24(n+1)2−n

WBJEE 2016 Math Solved Paper

Question : 62 of 75

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If ω is an imaginary cube root of unity, then the value of
(2 + ω) (2 - ω2) + 2 (3 - ω) ( 3 - ω2 + ..... + (n-1) (n - ω) ( n - ω2) is

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