Discussion :: Exam Questions Paper
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The given characteristic polynomial s4 + s3 + 2s2 + 2s + 3 = 0 has
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A.
zero root in RHS of s-plane
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B.
one root in RHS of s-plane
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C.
two roots in RHS of s-plane
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D.
three roots in RHS of s-plane
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Answer : Option C
Explanation :
By Routh's Array
When ε -> 0, two sign changes in the first column, so there are two roots in RHS plane.
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