How many roots with positive real parts do the equation s3+s2-s+1=0 have?
A. 0
B. 1
C. 2
D. 3
Answer:C
How many roots with positive real parts do the equation s3+s2-s+1=0 have?
A. 0 B. 1 C. 2 D. 3
Explanation: The roots with positive real parts are calculated with the help of the routh-hurwitz table and since the sign changes two times in first column therefore have two roots have positive parts.