i had form the matrix.
 1 1 1..........1
 1 w^1 w^2 
 1 w^2 w^4 
 .
 .
1............W^(n1)(n1)
Is the matrix above correct if i leave the Nth row & Nth coloum like that?
Qns 2
Consider another (N × N) square matrix S such that the (c, d)th element of S is given by Scd = w^(c1)(d1), c = 1,2,....,N; d = 1, 2, ...., NShow that determinant of S is equal to the complex conjugate of the determinant of R. Note all you need to show is that S and R are complex conjugate of each other. In other words, show that ω and ω−1 are complex conjugate of each other.
Is this correct?
w^N = exp (2*pi*j) = cos 2pi + j sin2pi = 1
w^N = exp (2*pi*j) = cos 2pi  j sin2pi = 1
Qns 3
Let T = SR. Write the elements of T.
May i know wat is w^2?
 3 1+w^1+w^2 ........

Once again many thank you for the help