Choose .(a) Show the conjugate of any nth root of unity is another root of unity, by expressing omega(bar)^j in the form omega^k for appropriate k.
We have, (since ).(b) Find the product of the nth roots of unity
How is that different from (b)?(c) Find the sum Summation (n-1), k=0 for omega^k of nth roots of unity. (this is a geometric series).