1.

The ROC of sequence x[n] = (0.8)n ‚à™[n] + (0.4)n ‚à™[n]

A. |z| > 0.8
B. |z| > 0.4
C. 0.4 < |z| < 0.8
D. |z| < 0.8
Answer» B. |z| > 0.4


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