Question: how to calculate dc gain?
Answer: DC Gain of a system is the gain at the steady state which is at t tending to infinity i.e., s tending to zero. Let s tend to zero, it will result in 12/(3*2) = 2 (ans.) Originally Answered: What is the d.c. gain of a system having the transfer function H(s) = 12/ {(s+2) (s+3)}?