Question: Let x(n) be a causal sequence.(a) What conclusion can you draw about the value of its z-transform X (z) at z = ??(b) Use the

Let x(n) be a causal sequence.(a) What conclusion can you draw about the value of its z-transform X (z) at z = ??(b) Use the result in part (a) to check which of the following transforms cannot be associated with a causal sequence. (1 - : (1 - : (z - ) (:) X() =

(1 - : (1 - : (z - ) (:) X() = (ii) X(:) = (: - * (ii) X(2) %3D

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