A unity feedback control system has the open loop transfer function G(s). For the system to be stable find the range of K.\(G\left( s \right) = \frac{{K\left( {s + 13} \right)}}{{s\left( {s + 7} \right)\left( {s + 3} \right)}}\)

A unity feedback control system has the open loop transfer function G(

1.	A unity feedback control system has the open loop transfer function G(s). For the system to be stable find the range of K.\(G\left( s \right) = \frac{{K\left( {s + 13} \right)}}{{s\left( {s + 7} \right)\left( {s + 3} \right)}}\)
A.	[0, 70]
B.	[0, 80]
C.	[0, 90]
D.	[0, 75]
Answer» B. [0, 80]