Control Systems
The characteristic equation of a feedback control system is given by s³ + 5s² + (k + 6)s + k = 0. In the root loci diagram, the asymptotes of the root loci for large 'k' meet at a point in the s-plane whose coordinates are

 (2,0)
 (-2,0)
 (1,0)
 (-1,0)

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Control Systems
For a transfer function H (s) = P(s) / Q(s), where P (s) and Q (s) are polynomials in s. Then

 maximum degree of P (s) and Q (s) differ at most by one.
 the degree of P (s) and Q (s) are same.
  degree of P (s) is independent of degree of Q (s).
 the degree of P (s) is always greater than the degree of Q (s).

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