ANSWER:
1st option.
[tex]f\left(x\right)=x^3\text{ and }g\left(x\right)=\frac{x+2}{x}[/tex]
STEP-BY-STEP EXPLANATION:
We have the following composite function obtained from two functions:
[tex]h(x)=\:\left(f\circ g\right)\left(x\right)=\left(\frac{x+2}{x}\right)^3[/tex]
We can determine the functions as follows:
[tex]\begin{gathered} \left(f\circ g\right)\left(x\right)=f\left(g\left(x\right)\right) \\ \\ f\left(g\left(x\right)\right)=\left(\frac{x+2}{x}\right)^3 \\ \\ g(x)=\frac{x+2}{x},\text{ therefore} \\ \\ f(x)=x^3 \end{gathered}[/tex]
Therefore, the correct answer is the 1st option.
