The loop-gain function L(s) of a control system with unity feedback is given to be \(L\left( s \right) = \frac{k}{{\left( {s + 1} \right)\left( {s + 2} \right)\left( {s + 3} \right)}}\), where k > 0. If the gain cross-over frequency of the loop-gain function is less than its phase cross-over frequency, the closed-loop system is

The loop-gain function L(s) of a control system with unity feedback is

1.	The loop-gain function L(s) of a control system with unity feedback is given to be \(L\left( s \right) = \frac{k}{{\left( {s + 1} \right)\left( {s + 2} \right)\left( {s + 3} \right)}}\), where k > 0. If the gain cross-over frequency of the loop-gain function is less than its phase cross-over frequency, the closed-loop system is
A.	unstable
B.	marginally stable
C.	conditionally stable
D.	stable
Answer» E.