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Signals and Systems - Engineering

Q1:

ROC of sequence x[n] = (3)n ∪[n] + (4)n ∪[- n - 1]

A |z| > 4

B 3 < |z| < 4

C |z| < 4

D |z| > 3

ANS:B - 3 < |z| < 4

x[n] = (3)n ∪(n) + (4)n ∪(- n - 1)