Question: If g(n) is a real valued sequence of 2N points and x1(n)=g(2n) and x2(n)=g(2n+1), then what is the value of G(k), k=0,1,2…N-1?
Options
A : X1(k)-W2kNX2(k)
B : X1(k)+W2kNX2(k)
C : X1(k)+W2kX2(k)
D : X1(k)-W2kX2(k)
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