Consider the following open-loop transfer function:\(G = \frac{{K\left( {s + 2} \right)}}{{\left( {s + 1} \right)\left( {s + 4} \right)}}\)The characteristic equation of the unity negative feedback will be

Consider the following open-loop transfer function:\(G = \frac{{K\left

1.	Consider the following open-loop transfer function:\(G = \frac{{K\left( {s + 2} \right)}}{{\left( {s + 1} \right)\left( {s + 4} \right)}}\)The characteristic equation of the unity negative feedback will be
A.	(s + 1)(s + 4) + K (s + 2) = 0
B.	(s + 2)(s + 1) + K (s + 4) = 0
C.	(s + 1)(s - 2) + K (s + 4) = 0
D.	(s + 2)(s + 4) + K (s + 1) = 0
Answer» B. (s + 2)(s + 1) + K (s + 4) = 0

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