Question: The open loop TF of a unity feedback system is given by G ( s ) = k / ( ( s + 2 )

The open loop TF of a unity feedback system is given by G(s)= k/((s +2)(s +4)(s ^2+6s +25))
(1) Determine the range of K for the system to be stable
(ii) Can the system be marginally stable? If so, find the required value of K and the frequency of sustained oscillations.

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