The value of the expression 1 (2- )(2- ^2)+2 (3- )(3- ^2)+ +(n-1)(n- )(n- ^2), where is an imaginary cube...

Question

The value of the expression 1 (2- )(2- ^2)+2 (3- )(3- ^2)+ +(n-1)(n- )(n- ^2), where is an imaginary cube root of unity is

Accepted Answer

(A)

JEE Main Mathematics question