Module 2 Flashcards
Cube Root
The cube root of a number is a number with a cube that is . The expression represents the cube root of .
Integers
The set of whole numbers and their opposites
Bar Notation
In repeating decimals, the line or bar placed over the digits that repeat
Counterexample
A statement or example that shows a conjecture is false
Inverse Operations
Pairs of operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.
Irrational Number
A number that cannot be expressed as the ratio, a/b where a and b are integers and b does not equal 0
Natural Numbers
Counting numbers
Perfect Cube
A number whose cube root is an integer. 27 is a perfect cube because its cube root is 3
Perfect Square
A number whose square root is a whole number. 25 is a perfect square because its square root is 5
Principal Square Root
The positive square root of a number
Radical Sign
The symbol used to indicate a positive square root
Rational Numbers
Numbers that can be written as the ratio of two integers in which the denominator is not zero
Real Number
The set of rational numbers together with the set of irrational numbers
Repeating Decimal
decimal form of a rational number, it repeats in a pattern
Square Root
One of the two equal factors of a number
