Ex. 400. s^3 + 25s^2 + 28s + k = 0 is a closed-loop characteristic equation (CLCE). It can be written in the form required by the root locus procedure: 1 + k(As^3 + Bs^2 + Cs + D)/(s^3 + Es^2 + F*s +...

Ex. 400. s^3 + 25s^2 + 28s + k = 0 is a closed-loop characteristic equation (CLCE). It can be written in the form required by the root locus procedure: 1 + k(As^3 + Bs^2 + Cs + D)/(s^3 + Es^2 + F*s + G) = 0. Determine in order: A,B,C,D,E,F, and G. ans:7