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Index

in a radical, the number above the radical symbol that indicates which root is to be taken: if nothing is written we assume it is 2.

Radicand

the number under a radical sign

Radical

an expression consisting of a radical sign, a radicand, and an index

Root

a quick way of saying "square root", for example "root 2" means √2

Base

in the expression a^n, a is the base

Exponent

in the expression a^n, n is the exponent

Power

in the expression a^n

Exact

a value that is accurate

Approximate

a value that is close to the actual value, but not completely accurate or exact.

Terminating Decimal

a decimal that does not continue on forever; it ends.

Repeating Decimal

a decimal number that has digits that repeat on forever.

Irrational Numbers

A number that cannot be written in the form m/n, where m and n are integers, n≠0. The decimal representation of an irrational number neither terminates nor repeats

Rational Numbers

a number that can be written as a fraction, with the denominator not 0. Its decimal representation either repeats or terminates.

Whole Numbers

(0,1,2,3...)

Natural Numbers

(1,2,3...)

Integers

(...-2,-1,0,1,2...)

Mixed Radicals

consists of both a radical as well as a coefficient that comes before it.

Entire Radicals

everything is placed under the radical symbol/root (as the radicand)

Simplest Form

A radical is in simplest form if the radicand does not contain a fraction or any factor which may be removed, and the radical is not part of the denominator of a fraction.

Reciprocal

The reciprocal of a number is one divided by that number The reciprocal of x is 1/x