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Last Updated : 21 Mar, 2018

A 4×4 DFT matrix is given by :
$1/2\begin{bmatrix} 1 & 1 & 1 &1 \\ 1& x &-1 &y \\ 1& -1& 1& -1\\ 1& -j& -1& 1 \end{bmatrix}$
(j² = −1)
Where values of x and y are _____, _____ respectively.

(A) 1, −1
(B) −1, 1
(C) −j, j
(D) j, −j

Answer: (D)

Explanation:

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