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				| 1. | What is the z-transform of the signal x(n) = - nu(-n-1)? | 
| A. | ( frac{1}{1- alpha z^{-1}} );ROC |z|<| | | 
| B. | (- frac{1}{1+ alpha z^{-1}} );ROC |z|<| | | 
| C. | (- frac{1}{1- alpha z^{-1}} );ROC |z|>| | | 
| D. | (- frac{1}{1- alpha z^{-1}} );ROC |z|<| | | 
| Answer» E. | |