# How do you find the domain of f(x) = 10/x ?

$x \setminus \in \setminus R \boldsymbol{,} x \setminus \ne 0$
Remember, the domain of a function is the possible input values of $x$.
Here, everything can going in $x$ except for $0$ as you cannot divide numbers by $0$.
Therefore, you write $x$ can be any real number except for $0$ ($x \setminus \in \setminus R \boldsymbol{,} x \setminus \ne 0$)