0 votes 0 votes The characteristic equation for a system is $S^{3}+9S^{2}+26S+12(2+K{_c}) = 0$. Using the Routh test, the value of $K{_c}$ that will keep the system on the verge of instability is $20.9$ $18.4$ $17.5$ $15.3$ Others gate2012 + – Milicevic3306 asked Mar 25, 2018 • edited Mar 15, 2021 by soujanyareddy13 Milicevic3306 7.9k points answer See all 0 reply