Problem

The z-transform of a sequence x(n) is given by Furthermore it is known that X...

The z-transform of a sequence x(n) is given by

Furthermore it is known that X (z) converges for |z| =1.

(a) Determine the ROC of X(z).

(b) Determine x(n) at n = —18. (Hint: Use contour integration.)

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Solutions For Problems in Chapter 3

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