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Which of the following statement regarding ROC of signal x(t)= u(t-4) is true?
(a)ROC is right half of s-plane
(b)ROC is entire s-plane
(c)ROC is left half of s-plane
(d)none of above
If the above signal was set to be the impulse response of a system, then such a system would be:
(a) Stable and causal
(b) Unstable and noncausal
(c) cannot determine
(d) stable but noncausal
Answer is ( )
Concept
Type Reasoning here
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