The characteristic equation of a system is 2s^5+s^4+4s^3+2s^2+2s+1=0 . Which one of the following is correct?
(a) Stable
(b) Marginally stable
(c) Unstable
(d) Oscillatory
The question was posed to me during an online interview.
My question is based upon Compensation Techniques topic in section Digital Control Systems of Control Systems