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A system's open loop transfer function is given by G left(...

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Control Systems
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A system's open loop transfer function is given by $$G\left( s \right) = \frac{K}{{s\left( {s + 2} \right)\left( {s + 4} \right)}}.$$     If system is having a unity negative feedback, which of the following is true for such system to be stable?

Answer & Solution
Correct Answer: Option D
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