Consider a unity negative feedback system in Figure 6.31 with loop transfer function

Chapter 0, Problem 9

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Consider a unity negative feedback system in Figure 6.31 with loop transfer function where L(s) = Gc(s)G(s) = K (1 + 0.5^)(1 + 0.5* + 0.25.V2 )' 0 0 - 5 1 0 -K 0 1 10 Determine the value of K for which the closed-loop system is marginally stable. a. K = 10 b. K = 3 c. The system is unstable for all K d. The system is stable for all K

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