Numerical - System function for given d.c.gain in pole-zero plot

Q.  For the pole-zero plot given below, what would be the value of system function H(s), if the d.c. gain of the system is 20?
- Published on 07 Oct 15
Pole-zero


a. 10 (s + 4) / (s + 1) (s2 + 6s - 10)
b. 20 (s - 4) / (s + 3) (s2 _ 6s +10)
c. 40 (s + 4) / (s + 3) (s2 - 6s - 10)
d. 50 (s + 4) / (s + 1) (s2 + 6s +10)

ANSWER: 50 (s + 4) / (s + 1) (s2 + 6s +10)

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