Question: For what range(s) of the adjustable parameter (mathrm{K}), do the following polynomials have all roots in the LHP ? (a) (s^{3}+(2+K) s^{2}+(8+K) s+6) (b) (s^{4}+(10+K)

For what range(s) of the adjustable parameter $\mathrm{K}$, do the following polynomials have all roots in the LHP ?

(a) $s^{3}+(2+K) s^{2}+(8+K) s+6$

(b) $s^{4}+(10+K) s^{3}+3 s^{2}+9 s+11$

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