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 a to the power of n=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

the degree of the root

Question 4

principal root

Answer 4

when there are two real roots the positive one is the principal root