Disscuss Question 7913 of Automatic Control Systems - Section 1 of Electronics and Communication Engineering :: Electronics & Communication Engineering

First column elements of Routh's tabulation are 3, 5, 28-268 It means that there

[A].	is one root in left half s plane
[B].	are two roots in left half s plane
[C].	are two roots in right half s plane
[D].	is one root in right half s plane

Answer: Option C

Explanation:

Since there are two sign changes in the first column, hence two roots in right half plane.