## What is the union of A and B?

The union of two sets A and B is the set of elements which are in A, in B, or in both A and B. In symbols, . As another example, the number 9 is not contained in the union of the set of prime numbers {2, 3, 5, 7, 11.} and the set of even numbers {2, 4, 6, 8, 10.}, because 9 is neither prime nor even.

## How do you write a union and intersection?

The union is written as $$A \cup B$$ or “$$A \text{ or } B$$”. 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 $$A \cap B$$ or “$$A \text{ and } B$$”.

What is the difference between union and intersection of sets?

The union of two sets contains all the elements contained in either set (or both sets). The intersection of two sets contains only the elements that are in both sets.

What is the difference between a union B and A intersection B?

In terms of set theory, union is the set of all the elements that are in either set, or in both, whereas intersection is the set of all distinct elements that belong to both the sets. The union of two sets A and B is symbolized as “A∪B”, whereas intersection of A and B is symbolized as “A∩B”.

### Does union MEAN AND or OR?

Unions. An element is in the union of two sets if it is in the first set, the second set, or both. The symbol we use for the union is ∪. The word that you will often see that indicates a union is “or”.

### Which is the Union and intersection of two sets?

Intersection of two sets is a set that contains all the common elements of two sets. Union of two sets is a set that contains all the elements of both of the sets. The symbol we use to write the union of two sets is ∪. Example 1: Find the union and the intersection of the given sets.

Which is an example of intersection and difference?

Example: If A = {1,2,3,4,5,6,7} and B = {6,7} are two sets. We can also say, that the difference of set A and set B is equal to the intersection of set A with the complement of set B. Hence, If U is a universal set and X is any subset of U then the complement of X is the set of all elements of the set U apart from the elements of X.

When is an element in the Union of two sets?

The Union and Intersection of Two Sets 1 Unions. An element is in the union of two sets if it is in the first set, the second set, or both. 2 Intersections. An element is in the intersection of two sets if it is in the first set and it is in the second set. 3 Combining Unions, Intersections, and Complements.

#### What does the Intersect sign stand for in logic gate?

I remember the intersect sign as a capital A without the crossbar — standing for “AND”, as in the logic gate. The intersection of two sets is the set of elements which are in the first set AND the second set. Comment on Ben Willetts’s post “I remember the intersect sign as a capital A witho…” Posted 3 years ago.