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12 terms

Algebra 2 Vocab: Chapter 7

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Nth Root
For any real numbers A and B, and any positive integer N, if A'N = B, then A is an Nth root of B.
Radicand
The number under the radical sign.
Index
Gives the degree of the root.
Principal Root
When a number has two real roots, the positive root is called the ______.
Rationalize the denominator
Rewrite an expression so there are no radicals in any denominator and no denominators in any radical.
Like Radicals
Radical expressions that have the same index and the same radicand.
Rational Exponent
Form of a radical that always indicates the principal root.
Radical Equation
An equation that has a variable on a radicand or has a variable with a rational exponent.
Composite Function
The output for the second function becomes the input for the second function. When you combine two functions, you form a _______.
Inverse Relation
If a relation maps element A of it's domain to element B of its range, the ______ "undoes" the relation and maps B back to A. If (a,b) is an ordered pair of a relation, then (b,a) is an ordered pair of it's inverse.
Inverse Functions
If F'1 and F'-1 are functions, they are called ______. For inverse functions, F'-1(F(x)) = x and F(F'-1(x)) = x.
Radical Function
A radical equation defines a radical function.