Find domain algebraically

In mathematics, the domain of a function refers to the set of all possible numbers that you can use as inputs, or x-values, in the function. For example, if your function is f(x) = 2x+3, then the domain is any number that you can use in place of x.

In this example, and with many other functions, the domain includes all real numbers. However, there are special cases where the domain will be more limited. For instance, if the function includes a fraction with a variable in the denominator, you’ll need to exclude any numbers from your domain that would result in the denominator of the fraction being equal to 0.

To figure this out, set the denominator as an equation equal to 0 and solve for x.

Values not in domain calculator

Let’s say you have a function f(x) = 2x/x^2-4. Start by writing out x^2-4 = 0. Factor the expression to get (x – 2) (x + 2) = 0. When you solve for 0, you’ll get two possible inputs: 2 and -2. This means you must exclude 2 and -2 from the domain.

Define the domain as “x = all real numbers except for 2 and -2.” You could also write it as D =

how to find values of x that are not in the domain of h

how to find all values of x that are not in the domain of h