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Sets
| Term | Definition |
|---|---|
| Element | An object in a set that is well defined |
| E | Means that it appears in a set. Used a crossed version to show that it doesn’t appear |
| Cardinal number | It’s written as #Q and represents the number of elements in a set |
| Sets | Am collection of well defined elements |
| Equal to | If two sets have the same value you write = and ≠ if it’s not |
| Null set | A set that contains no elements or value is written as { }. This is a subsets of every set |
| Subset | If all elements of set A or also in set B then A is a subsets of B. It’s written as C |
| Venn diagram | It’s written as two overlapping shapes |
| Intersection of sets | The intersection of any two sets are the elements of both sets. It’s written as A N B |
| Union | The union of any two sets are when both of them are combined. It’s written as A U B |
| Universal set | A set that contains every single element. This usually engulfs all the other sets |
| Complement of a set | It’s everything that’s NOT in a set. It’s written with a dash at the end of a sets name. E.g A’ means everything that is not a set of A |
Created by:
O15iny
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