For a given system Routh’s array is given below. The system is:
\(\left. {\begin{array}{*{20}{c}} {{s^4}}\\ {{s^3}}\\ {{s^2}}\\ {{s^1}}\\ {{s^0}} \end{array}} \right|\begin{array}{*{20}{c}} 1&3&7\\ 1&2&{0}\\ 1&7&\\ { - 5}&&\\ 7&& \end{array}\)
1
Marginally stable
2
Unstable
3
Stable
4
Conditionally stable