Set Notation and Sets of Numbers (VCE SSCE Mathematical Methods): Flashcards

A collection of objects

Is an element of

Is not an element of

$B$ is a subset of $A$

Elements common to both $A$ and $B$

All elements in $A$ or $B$ (or both)

Elements in $A$ but not in $B$

Counting numbers: $\{1, 2, 3, \ldots\}$

$\mathbb{N} \subseteq \mathbb{Z} \subseteq \mathbb{Q} \subseteq \mathbb{R}$

( ) excludes endpoint; [ ] includes it