We have to find the domain of the given rational expression
![(x)/(3)](https://img.qammunity.org/2019/formulas/mathematics/high-school/tevyis4oex26cw8af9giyfb6nmmyvvvudo.png)
Since, Domain of a function is the set of values for which the function is real and defined.
Here, for any value of x the value of y will be always real and defined.
So, we can say that the domain of the rational expression
is
or we can say the domain of the rational expression is