1. Let's start by understanding what the domain of a function means. 2. The domain is the set of all possible input values (usually $x$) for which the function is defined. 3. For many functions, you need to check where the function might be undefined, such as division by zero or taking the square root of a negative number. 4. For example, if your function is $f(x) = \frac{1}{x-2}$, the domain excludes $x=2$ because that makes the denominator zero and the function undefined. 5. In general, to find the domain, write down all restrictions on $x$ from the function's expression and exclude those values. 6. If you provide a specific function, I can walk you through finding its domain step-by-step.