 
			 
			MCQOPTIONS
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				| 1. | What is the ROC of a causal infinite length sequence? | 
| A. | |z|<r<sub>1</sub> | 
| B. | |z|>r<sub>1</sub> | 
| C. | r<sub>2</sub><|z|<r<sub>1</sub> | 
| D. | None of the mentioned | 
| Answer» C. r<sub>2</sub><|z|<r<sub>1</sub> | |