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For the unity feedback control system shown in the figure, the open-loop transfer function $G(s)$ is given as

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

The steady state error $e_{ss}$ due to a unit step input is 

  1. $0$
  2. $0.5$
  3. $1.0$
  4. $\infty$
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