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				| 1. | The characteristic equation of a system is given ass3+25s2+10s+50=0. What is the number of the roots in the right half s-plane and the imaginary axis respectively? | 
| A. | 1,1 | 
| B. | 0,0 | 
| C. | 2,1 | 
| D. | 1,2 | 
| Answer» C. 2,1 | |