Domain Function Values

The domain of a function on a graph is the set of all possible values of x on the x axis.

Domain function values. F x x 2 2. See the example given below to understand this concept. The domain of a function is the set of numbers that can go into a given function.

Since x 2 is never negative x 2 2 is never less than 2 hence the range of f x is all real numbers f x 2. Hence the domain of f x is all real values of x. In other words it is the set of x values that you can put into any given equation.

Polynomial functions have the domain of all reals and the range of all positive reals. For instance the natural domain of square root is the non negative reals when considered as a real number function. Is defined for all real values of x because there are no restrictions on the value of x.

A quadratic function has the form ax 2 bx c. For domain we have to find where the x value starts and where the x value ends i e the part of x axis where f x is defined. F x 2x 2 3x 4.

When the function f x x2 is given the values x 1 2 3 then the domain is simply those values 1 2 3. The domain of the function is all of the x values horizontal axis that will give you a valid y value output. All the values that go into a function.

Square root functions have a domain of x 0 and a range of y 0. If you want to know how to find the domain of a function in a variety of situations just follow these steps. Rational functions have a domain of x 0 and a range of x 0.