Subset Complement Intersection Well Set What is it

If any element in set A belongs to the set B, then A is a subset of B, for the three sets ABC, if the intersection of A and B is empty, and the union of A and B is equal to C, then A is the complement of B in C, and the set of elements belonging to A and B is the intersection of A and B, and the set of elements belonging to A or belonging to B is the union of A and B.

For example, a=, b=, d=, then there are: a b, a c, a d, b d, c d; A is the complement of b in d (the complement symbol is not easy to play); b∩c=a；b∪c=d

1.Intersection. (1) Definition: The set composed of all the elements that belong to set A and belong to set B is called the intersection of A and B

2.Union. (1) Definition: A set of all elements belonging to set A or to set B.

3. Supplement. (1) Definition: Let s be a set, A is a subset of S, and the set composed of all elements in S that do not belong to A is called the complement (or remainder) of the subset A in S

There are textbooks.

1) Definition of subset: For two sets A and B, if any element of Set A is an element of Set B, we can say Set A Set B, or Set B Set A, or Set A is a subset of Set B. denoted as or if set A is not included in set B, or if set B does not contain set A, it is denoted as .?

Stipulate: An empty set is a subset of any collection

If ab, and a≠b, set A is said to be set b, denoted as .?

2) Definition of intersection: In general, a set composed of elements belonging to set A and belonging to set B is called the intersection of a and b. denoted as (pronounced "a to b"), i.e. a b = {x|x a and x b}.?

3) Definition of union: In general, a set composed of elements belonging to set A and belonging to set B is called the union of a and b. denoted as (pronounced "a and b"), i.e. a b = ).?

4) Definition of complement: In general, let s be a set, a is a subset of s, and the set composed of all the elements of a in s is called the complement (or remainder) of the subset a in s, which is denoted as ,

A set is made up of elements, and anything in the world can be an element, which means that anything together is a set.

The elements of the true subset are part of the set, but there are fewer elements than the original set, so there is no true subset of the empty set.

The elements of a subset are part of a set, but there can be as many elements as the original set.

An intersection is a set of two or more sets of common meta-ruler slippery elements.

A union is a collection of two or more collection elements. Common elements are counted only once.

The complement is the set of the original set of Lapei and the elimination of the remaining elements of a certain subset of them.

Same understanding. Understand what the elements are first. The composition of the elemental spring sedan is the collection.

Understand the 3 characteristics of the set of Fandan. If the set understands the land. to understand. Repair. Delivered. Combine.

Intersection and complement the related concepts, how to learn it well.