 
			 
			MCQOPTIONS
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				| 1. | Linear time-invariant systems must satisfy | 
| A. | additivity and time dependent constants only | 
| B. | symmetry and time dependent constants Only | 
| C. | additivity, homogeneity (symmetry) and time dependent-constants | 
| D. | additivity only | 
| Answer» D. additivity only | |