# Given f(x)=2^x, g(x)=4 how do you determine the combined function y=(f-g)(x) and state its function?

$y = {2}^{x} - 4$
The combined function $y = \left(f - g\right) \left(x\right)$ simply means that $y = f \left(x\right) - g \left(x\right)$, therefore, we can write the combined function as:
$y = {2}^{x} - 4$