Answer:
1. Terms
a word or phrase used to describe a thing.
2. Subset
a part of a larger group of related things.
3. Null set
is the set that does not contain anything.
4. Union of Set
a collection of sets is the set of all elements in the collection.
5. Intersection of Set
the intersection of two sets A and B, denoted by {\displaystyle A\cap B, }
6. Complement of Set
the set that includes all the elements of the universal set that are not present in the given set.
7. Cardinality of set
measure of the "number of elements" of the set.
8. Difference of two sets
The difference of two sets, written A - B is the set of all elements of A that are not elements of B. The difference operation, along with union and intersection, is an important and fundamental set theory operation.
