Question: For the closed loop system shown in Fig. D4.9. (a) For what values at (mathrm{K}) is the system stable? (b) For what value of (mathrm{K})

For the closed loop system shown in Fig. D4.9.
(a) For what values at $\mathrm{K}$ is the system stable?
(b) For what value of $\mathrm{K}$ is the system marginally stable?
(c) For the value of $\mathrm{K}$ in part $(b)$, what are the two imaginary axis roots?

R(s)- K s+1 1 $+2 1 s(s+5) Y(s)

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