Control Systems
The open loop transfer function of a unity feedback system is given by G(s) = 1/(s+2)². The closed loop transfer function will have poles at

 -2,-2
 -2,2
 -2,-1
 -2+j,-2-j

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Control Systems
An open loop control system, represented by the transfer function G ( s ) = ( s - 1 ) / ( s + 2 )( s + 3 ), is

  stable and of the minimum phase type.
  unstable and of the non minimum phase type .
  stable and of the non-minimum phase type.
  unstable and of the minimum phase type.

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