Suppose x[n] is an absolutely summable discrete- time signal. Its z-transform is a rational function with two poles and two zeroes. The poles are at z = ±2j. Which one of the following statements is TRUE for the signal x[n]?
A. It is a finite duration signal
B. It is a causal signal
C. It is a non-causal signal
D. It is a periodic signal
Answer: Option C
This Question Belongs to Electronics And Communications Engineering >> Signal Processing
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