If ω=cos(2π/3)+isin(2π/3)\omega = \cos(2\pi/3) + i\sin(2\pi/3)ω=cos(2π/3)+isin(2π/3), what is the result of 1+ω+ω21 + \omega + \omega^21+ω+ω2?
1
i
0
-1