If `omega ` be a nth root of unity, then `1+omega+omega^2+…..+omega^(n-1)` is (a)0(B) 1 (C) -1 (D) 2

If omega ne 1 is a cube root of unity, then 1, omega, omega^(2)

If 1, omega, omega^2 ,…..,omega^(n-1) are the nth roots of unity, then (2- omega)(2-omega^2)….(2-omega^(n-1) ) equals

If omega is a cube root of unity , then |(x+1 , omega , omega^2),(omega , x+omega^2, 1),(omega^2 , 1, x+omega)| =

if 1,omega,omega^(2),............omega^(n-1) are nth roots of unity,then (1-omega)(1-omega^(2))......(1-omega^(n-1)) equal to