Electrical Engineering > GATE 2026 > Z-Transform
Consider the infinite-length, discrete-time sequence x[n] = 0.9|n|, where n is an integer. The region of convergence of its Z-transform X(z) is given by:
(Note: z is a complex variable)
A
|z| > 0.9
B
|z| < 0.9
C
0.9 < |z| < 1/0.9
D
{z such that |z| < 0.9} ∪ {z such that |z| > 1/0.9}

Correct : c

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