4th October 2019

15

# What does the upside down U mean in Venn diagrams?

The circles A and B represent sets. "Intersect" is represented by an upside down U. The intersection is where the circles overlap. "Union" is represented by a right-side up U. The union is the entire area of both circles.

Beside this, what is the U in interval notation?

Using Interval Notation. If an endpoint is included, then use [ or ]. If not, then use ( or ). For example, the infinite interval containing all points greater than or equal to 6 is expressed [6,Inf). If the set includes more than one interval, they are joined using the union symbol U.

What is the difference between a union and intersection?

14.4 Union and intersection (EMA7Z) The union of two sets is a new set that contains all of the elements that are in at least one of the two sets. The intersection of two sets is a new set that contains all of the elements that are in both sets. The intersection is written as A ∩ B or “ A and B ”.

What is the upside down U in math?

Union and Intersection. We just saw how to join two sets using "Union" (and the symbol ∪). There is also "Intersection" which means "has to be in both". Think "where do they overlap?". The Intersection symbol is an upside down "U" like this: ∩