Final answer:
To find the union of sets A and B, combine the elements of both sets without repeating any elements.
Step-by-step explanation:
In this question, we are given two sets A and B and we need to find the union of A and B.
Set A contains the numbers 1, 2, 3, and 6.
Set B contains numbers that are even and less than 91. So, B = {2, 4, 6, 8, 10, ..., 90}.
The union of A and B, denoted as A U B, is the set that contains all the elements that are in A or B, or both. To find the union, we simply combine the elements of A and B without repeating any elements.
So, the union A U B would be {1, 2, 3, 6, 4, 8, 10, ..., 90}.