What does the intersection of mathematics mean?

Question 1: What is the union of intersection and union in mathematics? * * with elements belonging to A or B is called the union (set) of A and B, marked as A∪B (or B∪A) and pronounced as A and B (or B and A), that is, A ∪ B = {

The intersection of elements belonging to A and B: *, which is called the intersection (set) of A and B, marked as A∩B (or B∩A) and pronounced as A ∩ B (or B ∩ A), that is, A ∩ B = {x | x ∈ A

Question 2: What do you mean by intersection and union of high school mathematics? They are always mixed together, which one should have both? Union is a merged * * *, and there are both * * *.

Intersection is the intersection of * * * and the common element of * * *

Question 3: Mathematical intersection symbols

Question 4: What does the intersection of mathematics in the first grade of primary school mean? Intersection is to find the same part of two or more * * *. When I was in primary school, I just looked for the same part, usually numbers.

Question 5: What do you mean by intersection? Not in mathematics, it means that different things and feelings are gathered or intertwined.

For example: mixed feelings: feelings: feelings; Cross: simultaneous occurrence. Feelings are intertwined. Describe a lot of feelings and complicated feelings.