a0 sn + a1 sn-1 + a2sn-2 + ...........+ an-1 s1 + an
The necessary condition for system stability for the above characteristic equation is
1
All the coefficients of the characteristic equation should be zero.
2
All the coefficient of the characteristic equation should be unity.
3
All the coefficients of the characteristic equation should be positive and real.
4
All the coefficients of the characteristic equation should be negative and imaginary.
5
Question Not Attempted