The gain condition may be used to find the required value of at the root as K KG()= =1(48) S+2 S or K=sN(+2)9 Another example for the root locus of a system for varying a parameter other than gain is introduced Consider a system shown in the figure below 2022-2-3 82022-2-3 8 The gain condition may be used to find the required value of at the root as       1 1 1 1 2 2 s s K K KG s s s s s       K  s1 s1  2 Another example for the root locus of a system for varying a parameter other than gain is introduced. Consider a system shown in the figure below. or (4.8) (4.9)