Which of the systems having following transfer functions is stable? – McqOptions

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1.	Which of the systems having following transfer functions is stable?
A.	1/(s2+ 2)
B.	1/(s2-2s + 3)
C.	1/(s2 + 2s + 2)
D.	exp(-20s)/(s2 + 2s-l)
Answer» D. exp(-20s)/(s2 + 2s-l)

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