Chapter 5.4, Problem 7SBE

Formulas for Composed functions In Exercises S-5 through S 8, find $f\left(g\left(x\right)\right)$ and $g\left(f\left(x\right)\right)$.

S-7. If $f\left(x\right)=\frac{1}{x}$ and $g\left(x\right)=\frac{1}{x}$, find $f\left(g\left(x\right)\right)$ and $g\left(f\left(x\right)\right)$.