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A negative feedback system has loop transfer function KL(s) for some constant...

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A negative feedback system has loop transfer function KL(s)KL(s) for some constant KK. The function LL has two poles in the right-half plane. The Nyquist plot of LL is shown below (i.e. in this case K = 1K = 1).

nyquist2

For which of the following values of KK is the closed-loop system stable?

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