**Chapter 7Radical Functions and Relations**

7.1 Square Root Function

7.2 *n*th Roots

7.3 Working with Radical Expressions

7.4 Rational Exponents

7.5 Radical Equations

**7.1 Square Root Function**

If a function includes the square root of a variable, it is called a *square root function*. The parent function is . The domain of the parent function is *x* ≥ 0 since the square root of a negative number is not defined over the set of real numbers. Furthermore, the range of the parent function is *f(x)* ≥ 0 since the square root of a number is positive.

Notice that ...