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(i) y[n] = x[2 – n] is non-causal
(ii) y[n] = x[n] cos ω0 is causal
(iii) y[n] = sgn [x(n)] is non-causal
Which of the above statement is false?
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- 1
- 2
- 3
- None of these
Correct Option: C
(i) y[n] = x[2 – n] is non causal for any negative value of n.
(ii) y[n] = x[n] cos ω0n is causal for any value of n.
(iii) y[n] = sgn [x(n)] is causal for any value of n.
Hence, alternative (C) is the correct choice.
