Question

how do you find the domain of the rational expression x over 3 ?
$\frac{x}{3}$

Answer 1

We have to find the domain of the given rational expression $\frac{x}{3}$

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 $\frac{x}{3}$ is $(-\infty ,\infty )$ or we can say the domain of the rational expression is $-\infty <x<\infty$