Q.18 A discrete-time signal 
has z -transform X(z). If Y(z) = X(−z) is the z -transform of another signal y [6], then
(A) y[n] = x[n]
(B) y[n] = x[−n]
(C) y[n] =− x[n]
(D) y[n] =− x[−n]
Answer: (C)
Explanation:
Q.18 A discrete-time signal has z -transform X(z). If Y(z) = X(−z) is the z -transform of another signal y [6], then
(A) y[n] = x[n]
(B) y[n] = x[−n]
(C) y[n] =− x[n]
(D) y[n] =− x[−n]
Answer: (C)
Explanation:
