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electronics and communication engineering signals and systems
1. If then system is
(A): casual
(B): casual at z = 0.4, 2
(C): uncasual
(D): uncasual at z = 0.4, z = 2
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By: guest on 02 Jun 2017 01.13 am
ROC will be |z| > 0.4 and |z| > 2 Hence ROC ⇒ |z| > 0.4, which is exterior of circle of radius 0.4 Hence causal if ROC is |z| > 0.4 then non-causal.
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