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Step-by-step explanation:
In set theory, the following definition are present;
1.Element -an item in a set, where a set is a collection of things that have something in common. The symbol for set is { 1,2,} denoted by S
5/7. Empty set- a set that has no elements in called an empty set represented by the symbol { }. It is also called a null set. For example, if you were to find a set of all senior citizens who are less than 5 years old. There are no senior citizens under five years old.Such a set has no elements thus it is a null set.
2. Infinite set -is a set that is not a finite set and can be countable or uncountable. For example, a set of all integers {---,-1,0,1,2,3,...} is a countably infinite set.
3. A finite set is one that has a finite number of elements in that you could count and finish counting.In finite set there is an bijection between set X and the finite whole numbers. For example; N_n={1,2,3...,n}
4. Whole numbers are positive numbers that includes zero with no fractions or decimals.For example the set of whole numbers {0,1,2,3,4,5,...}
6. Subset- is a set made up of components of another set.A set A is a subset of another set B if all elements of set A are elements of set B. This means set A is contained inside set B. i.e A⊂B
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Set theory :https://brainly.com/question/6948738
Keywords : definition, match, symbol
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