The value of expression 2(1+ ) (1+ ^2 )+3(2+ ) (2+ ^2 )+4(3+ ) (3+ ^2 )+ +(n+1)(n+ ) (n+ ^2 ), where is an...

Question

The value of expression 2(1+ ) (1+ ^2 )+3(2+ ) (2+ ^2 )+4(3+ ) (3+ ^2 )+ +(n+1)(n+ ) (n+ ^2 ), where is an imaginary cube root of unity is

Accepted Answer

(C)

JEE Main Mathematics question