Determine the z-transform of the sequence x(n) = 3"u(n – 3) using z-transform properties. Express X(z) as a rational function in z-1. 9z 9z-3 b. 1 + 9 z-1 27 z-3 27 z-3 d. 1 + 3 z-1 a. 1 – 9z-1 c. 1 – 3z-1

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