7.1 roots radical expressions

Question 1

radicand

Answer 1

the number under the radical sign

Question 2

index

Answer 2

gives the degree of the root

Question 3

principal root

Answer 3

when a number has two real roots the positive is called the principal root and the radical sign indicates the principal root

Question 4

nth root

Answer 4

for any real numbers a and b and any positive iinteger n if a^n=b then a is an nth of b