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QUESTION 1 (a) Explain the significant of causal system compare to non-causal system. (b) Consider a...

QUESTION 1
(a) Explain the significant of causal system compare to non-causal system.


(b) Consider a system ?(?)=4??(?)+4?(?−1). Determine the system properties in term of:
(i) Linear.
(ii) Time-Invariant.

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