Answer:
A function and its inverse
Step-by-step explanation:
The property (fg)(x)= x holds for a function and its inverse.
For instance:
Let
[tex]f(x) = 2x[/tex]
and
[tex]g(x) = \frac{x}{2} [/tex]
These two functions are inverse of each other.
[tex]f(g(x)) = 2( \frac{x}{2} ) = x[/tex]
