# What is the equation for a radical function?

## What is the equation for a radical function?

If a function is defined by a radical expression, we call it a radical function. The square root function is f(x)=√x f ( x ) = x . A radical function is a function that is defined by a radical expression.

## What are the key features of a radical function?

A radical function contains a radical expression with the independent variable (usually x) in the radicand. Usually radical equations where the radical is a square root is called square root functions. The value of b tells us where the domain of the radical function begins.

A single radical function, carefully studied, leads students to important conclusions about inverse functions and extraneous solutions. Solve simple rational and radical equations in one variable, and give examples showing how extraneous solutions may arise.

A radical function is a function that contains a square root. Radical functions are one of the few types of functions that require you to consider the domain of the function before you graph the function. The domain is the x values of a given function or relation.