7.1: Roots and Radical Expressions

Question 1

nth root

Answer 1

for any real numbers a and b, and any positive integer n, if an = 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