The region of convergence of the sequence an u(n) is

1.	The region of convergence of the sequence an u(n) is
A.	\|z\| < \|a\|
B.	\|z\| > \|a\|
C.	\|z\| > 1
D.	\|z\| < 1
Answer» C. \|z\| > 1

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