engineering recuitment GATE ECE 2023-24 Test Series Control Systems Stability Analysis Condition For Stability
Consider an even polynomial p(s) given by
p(s) = s4 + 5s2 + 4 + K
where K is an unknown real parameter. The complete range of K for which p(s) has all its roots on the imaginary axis is ________.
1
\(-4 \le K \le\frac{9}{4} \space \)
2
\(-3 \le K \le\frac{9}{2}\space \)
3
\(-6 \le K \le\frac{5}{4}\space \)
4
\(-5 \le K \le 0\space \)