Answer:
option A would be correct.
Step-by-step explanation:
The only pairs of function [tex]f(x)=x^2[/tex] and [tex]g(x)=\frac{1}{x}[/tex] satisfying (f•g)(x)=x.
Check:
[tex]\left (f\cdot g\right )(x)[/tex][tex]=f\left (x\right )g(x)[/tex]
= [tex]x^2\cdot \frac{1}{x}[/tex] = [tex]x[/tex].
(f•g)(x)=x.
Therefore, from the options only Option A would be the required answer