Question

The sets A and B are shown below

A= (0,5,10,15)
B=(-4,-2,0,2,10)
Find the union of A and B

Answer 1

The union of the sets is {-4,-2,0,2,5,10,15}.

The intersection of the sets is {0,10}.

Explanation:

`A \cup B` means the list elements that you see in either set:

{-4,-2,0,2,5,10,15}.

Notice I didn't list any element twice for occurring in both sets.

`A \cap B` means the elements that occur in both set or the elements you see in common between the two if you prefer this wording of the definition:

{0,10}.