7.1: Roots and Radical Expressions

Question 1

nth Root

Answer 1

For any real numbers a and b, If a^n=b, then a is the nth root of b.

Question 2

Radicand

Answer 2

The number under the radical sign.

Question 3

Index

Answer 3

The index gives the degree of the root.

Question 4

Principal Root

Answer 4

When a number has two real roots, the positive root is called the principal root.