Chemical Engineering > GATE 2012 > Control System Stability
The characteristic equation for a system is s3+9s2+26s+12(2+Kc)=0. Using the Routh test, the value of Kc that will keep the system on the verge of instability is
A
20.9
B
18.4
C
17.5
D
15.3

Correct : c

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