# Domain and Range of a function

In this post, we find the domain and range of a function with the help of different examples.

Example: 1 Find the domain and range  of x2.

Solution.

Domain: Set of all real numbers

Range:    Set of all non –negative real numbers.

Example: 2 Find the domain and range  of   $\frac{x}{(x^2-4)}$ .

Solution.

Domain: Set of all real numbers except -2 and 2

Range:    Set of all real numbers.

Example: 3 Find the domain and range  of    $\sqrt{x^2-9}$.

Solution.

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