7.1: Roots&Radical Expressions

Question 1

nth Root

Answer 1

For any real numbers a and b, and any positive integer n, if a to the nth power=b, then a is an nth root of b

Question 2

Radicand

Answer 2

The number under the radical sign.

Question 3

Index

Answer 3

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 and the radical sign indicates the principal root.