The characteristic equation of the control system is s5+15s4+85s3+225s – McqOptions

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1.	The characteristic equation of the control system is s⁵+15s⁴+85s³+225s²+274s+120=0 . What are the number of roots of the equation which lie to the left of the line s+1 = 0?
A.	2
B.	3
C.	4
D.	5
Answer» D. 5

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