The transfer function of a system is represented by the equation
\(\ddot y\left( t \right) - 3\dot y\left( t \right) - 4y\left( t \right) = \ddot u\left( t \right) + 2\dot u\left( t \right) + 2u\left( t \right),\)
Which of the following statements is/are true?
1
The poles of the system are 1 and -4
2
The zeros of the system are -1 + j and -1 - j
3
The system is unstable
4
The steady state value of the output is zero