Question: A closed loop system is described by characteristic equation [ left(s^{2}-4ight)(s+1)+K(s-1)=0 ] The root locus with (mathrm{K}) varying from 0 to (infty), is (a) (c)

A closed loop system is described by characteristic equation
\[
\left(s^{2}-4ight)(s+1)+K(s-1)=0
\]
The root locus with $\mathrm{K}$ varying from 0 to $\infty$, is

(a) (c) -2 -2 -1 jo joo 1 2 1 1 1

(a) (c) -2 -2 -1 jo joo 1 2 1 1 1 12 10 a (b) (d) -2 -2 jo jo 0 1 2 2 1

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