The forward transfer function \(G\left( s \right) = \frac{{20}}{{\left[ {{s^3} + 2{s^2} + 4s} \right]}}\) and the feedback gain H(s) = -0.8. Find the closed loop transfer function of the SFG.

\(\frac{{20s}}{{\left( {{s^3} + 2{s^2} + 4s + 20} \right)}}\)

\(\frac{{20s}}{{\left( {{s^3} + 2{s^2} + 4s + 16} \right)}}\)

\(\frac{{20}}{{\left( {{s^3} + 2{s^2} + 4s + 20} \right)}}\)

\(\frac{{20}}{{\left( {{s^3} + 2{s^2} + 4s + 16} \right)}}\)

The forward transfer function \(G\left( s \right) = \frac{{20}}{{\left

1.	The forward transfer function \(G\left( s \right) = \frac{{20}}{{\left[ {{s^3} + 2{s^2} + 4s} \right]}}\) and the feedback gain H(s) = -0.8. Find the closed loop transfer function of the SFG.
A.	\(\frac{{20s}}{{\left( {{s^3} + 2{s^2} + 4s + 16} \right)}}\)
B.	\(\frac{{20}}{{\left( {{s^3} + 2{s^2} + 4s + 20} \right)}}\)
C.	\(\frac{{20}}{{\left( {{s^3} + 2{s^2} + 4s + 16} \right)}}\)
D.	\(\frac{{20s}}{{\left( {{s^3} + 2{s^2} + 4s + 20} \right)}}\)
Answer» D. \(\frac{{20s}}{{\left( {{s^3} + 2{s^2} + 4s + 20} \right)}}\)