7.1 Roots and Radical Expressions

Question 1

Radicand

Answer 1

The number under a radical sign is the radicand.

Question 2

Index

Answer 2

With a radical sign the index indicates the degree of the root.

Question 3

Principal Root

Answer 3

When a number has two real roots the positive root is called the principal root. A radical sign indicates the principal root. The principal root of a negative number a is.

Question 4

nth Root

Answer 4

For any real numbers a and b and any positive integer n if an= b then a is an nth root of b.