Question: The open loop DC gain of unity negative feedback system with closed-loop transfer function (frac{s+4}{s^{2}+7 s+13}) is (a) (frac{4}{13}) (b) (frac{4}{9}) (c) 4 (d) 13

The open loop DC gain of unity negative feedback system with closed-loop transfer function \(\frac{s+4}{s^{2}+7 s+13}\) is
(a) \(\frac{4}{13}\)
(b) \(\frac{4}{9}\)
(c) 4
(d) 13

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