1.

If the ROC of X(z) is r1

A. |a|r1<|z|<|a|r2
B. |a|r1>|z|>|a|r2
C. |a|r1<|z|>|a|r2
D. |a|r1>|z|<|a|r2
Answer» B. |a|r1>|z|>|a|r2


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