Question 706169
Unless you have a reason to limit the domain of a function, the domain is all real numbers. Reasons for limiting the domain of functions include:<ul><li>Denominators that might become zero for certain x values</li><li>Radicands of even-numbered roots that might become negative for certain values of x. ("Radicand" is the name for the expression inside a radical. Even-numbered roots would be square (2nd), 4th, 6th, etc. roots.)</li><li>Arguments or bases of logarithms that might become invalid for certain values of x</li></ul>There are other reasons to limit the domain but the above are the most common.<br>
Your function has no denominators, no even-numbered roots and no logarithms. So you have no reason to limit the domain. The domain of function f is all real numbers.