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An open loop transfer function $G(s)$ of a system is

$G(s)=\dfrac{k}{s(s+1)(s+2)}$

For a unity feedback system, the breakaway point of the root loci on the real axis occurs at,

  1. $−0.42$
  2. $−1.58$
  3. $−0.42$ and $−1.58$
  4. None of the above
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