7-1 Roots and Radical Expressions

Question 1

nth root

Answer 1

For any real number a and b , and any positive integer n, if a(n) = b, then a is an nth root of b.

Question 2

radicand

Answer 2

A radical sign is used to indicate a root. The number under the radical sign is the radicand.

Question 3

Index

Answer 3

The index gives the degree of the root.

Question 4

principal root

Answer 4

when a number has to real root, the positive root is called the principal root.