What is union and intersection of sets?

Answer 1

Given any two sets, for instance, A={ai} and B={bi}, the union of the sets are the values that are contained in either A orB, whereas the intersection of the sets are the values that are contained in both A and B.

For instance, let A={1, 2, 4, 6, 9, 12} and B={1, 5, 7, 9, 11, 15}, then the union would be A∪B={1, 2, 4, 5, 6, 7, 9, 11, 12, 15} and the intersection would be A∩B={1, 9}.

Answer 2

Union: putting the elements of the sets together

Intersection: getting the common elements of the sets

Example:

Set A={1,2,3}

Set B={2,3,4,5}

Union of Sets A&B= {1,2,3,4,5}

Intersection of Sets A&B = {2,3}

Answer 3

Union 'U' is both sets made into one larger set.

Intersection 'N' is the terms common to both sets.

e.g.

Set A { 1, 2, 4.}

Set B { 1, 3, 5}

The Union is

A 'U' B = { 1,1,2,3,4,5}

The Intersection is

A 'N' B = { 1,1}