0 votes 0 votes A unity negative feedback system has the open-loop transfer function $G(s) = \frac{K}{s(s+1)(s+3)}$. The value of the gain $K (>0)$ at which the root locus crosses the imaginary axis is ________ Control Systems gate2015-ec-1 numerical-answers control-systems bode-and-root-locus-plots + – Milicevic3306 asked Mar 27, 2018 • recategorized Nov 15, 2020 by soujanyareddy13 Milicevic3306 16.0k points 89 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.