I have a homework problem that says:
For $g(x,y)=xy-5$ compute $h(x) = \mu y(g(x,y))$ and determine its domain.
I was under the impression that this means the least y such that $g(x,y)=0$, so then $y = \frac{5}{x}, D=\{x \in \mathbb{N}, x \neq 0\}$
So $h(x)=\frac{5}{x}$?