Control Systems
The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

 2/(s² + 3s + 2)
 2/(s² + s + 2)
 1/(s² + s + 2)
 1/(s² + 3s + 2)

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

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