You do not have to indicate the domain.$)$

$($a$)f(x)=\frac{3}{x},x0$

$($b$)f(x)=2x+7$

$g(x)=\frac{3}{x},x0$

$g(x)=2x-7$

$f(g(x))=$

$f(g(x))=$

$g(f(x))=$

$g(f(x))=$

$f$ and $g$ are inverses of each other

$f$ and $g$ are inverses of each other

$f$ and $g$ are not inverses of each other

$f$ and $g$ are not inverses of each other