Question: A unity feedback system has a loop transfer function Where K = 20. Find the roots of the closed-loop systems characteristic equation. L(s): = K

A unity feedback system has a loop transfer function 

L(s): = K (s+1)(s+3)(s+ 6)'

Where K = 20. Find the roots of the closed-loop system’s characteristic equation.

L(s): = K (s+1)(s+3)(s+ 6)'

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