Answer:
A U B = {17, 19, 20, 21, 22, 24}
Explanation:
The symbol U is the union symbol, which denotes the union of two sets.
This means that given two sets A and B, the expression
A U B
indicates all the elements that belong to either set A or set B.
In this problem, we have the following two sets:
A = {19, 20, 21, 24}
B = {17, 19, 20, 22}
We can therefore list all the elements belonging to either set A or set B, they are:
17, 19, 20, 21, 22, 24
So, the expression A U B indicates the set:
A U B = {17, 19, 20, 21, 22, 24}