Final answer:
The union of sets A and B is {1, 5, 8, 12, 17}.
Step-by-step explanation:
The union of two sets A and B is the set that contains all elements from both sets. In this case, set A is {1, 5, 8, 12, 17} and set B is {5, 17}. To find the union, we combine all the elements from both sets, without duplicating any elements.
The union of sets A and B would be {1, 5, 8, 12, 17} because these are all the unique elements present in both sets.