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				| 1. | If M and N are the orders of numerator and denominator of rational system function respectively, then how many memory locations are required in direct form-I realization of that IIR filter? | 
| A. | M+N+1 | 
| B. | M+N | 
| C. | M+N-1 | 
| D. | M+N-2 | 
| Answer» B. M+N | |