A unity feedback system with the open loop transfer function (mathrm{G}(s)=frac{1}{s(s+2)(s+4)}) has gain margin of (a) (33.6

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A unity feedback system with the open loop transfer function \(\mathrm{G}(s)=\frac{1}{s(s+2)(s+4)}\) has gain margin of
(a) \(33.6 \mathrm{~dB}\)
(b) \(32.4 \mathrm{~dB}\)
(c) \(32.6 \mathrm{~dB}\)
(d) \(30.6 \mathrm{~dB}\)

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