# Questions & Answers of Mathematical Modeling and Representation of Systems

For the signal-flow graph shown in the figure, which one of the following expressions is equal to the transfer function ${\overline{)\frac{Y\left(s\right)}{{X}_{2}\left(s\right)}}}_{{X}_{1}\left(s\right)=0}$?

Find the transfer function $\frac{Y\left(s\right)}{X\left(s\right)}$ of the system given below.

$\mathrm{y}=3{x}_{1}$