The error E(s) of a control system is represented by the following mathematical relationship: 1+ TS(1KGe(s)G(s)) TS + 1+ KG(s)G(s) E(s) = It is considered that for the system: lim SG (s)G(s) = 0. 50 Show that the steady state error for a unit step input is: ess = lim s E(s) = 3-0 -R(s). 1 1 + K lim Ge(s)G(s) 5-)