Set & set notation

Set & Set notation

Gotta start somewhere

sets & subsets

Given S = {1, 2, 3, 4, 5, 6, 7, 8, 9 10}

Real numbers

Set & interval notations

There are many ways to express a set or subset of values. Using either simple bounded or unbounded inequalities, set or interval notations

+ Info

The real number system (R)

Is a huge set (collection) of values. Think of it as a growing set you learned more and more as you progressed through school.

• Natural numbers (N) are your counting numbers. (Pre-K and Kinder)
• Whole numbers (W) just added 0 to natural numbers.
• Integers (Z) are your positive & negative whole numbers.
• Rational Numbers (Q) are your numbers that can be written as a fraction (Ratio).
• Irrational Numbers (I) are the numbers not rational.

CK-12 Foundation

Interval and Set-builder notations

Use parenthesis in interval notation or open circle on a graph to indicate < or > (exclusive) Use square brackets in interval notation or closed circle to indicate >= or <= (inclusive) Inequality notation is just set-builder dressed down (take the "{x| }" off)