(3,5,7,9,11)U(3,6,9,12,15) would correctly be expressed as
To express the union of two sets (A and B), you need to combine all the elements from both sets without repeating any elements. The union is denoted by the symbol "∪".
In this case, we have the sets A = {3, 5, 7, 9, 11} and B = {3, 6, 9, 12, 15}. To express the union of these two sets correctly, we need to combine all the elements from both sets without any repetition.
The union (∪) of sets A and B can be expressed as:
(3, 5, 7, 9, 11)∪(3, 6, 9, 12, 15)
To find the union, we combine all the elements from both sets without repeating any elements:
(3, 5, 7, 9, 11, 6, 12, 15)
Therefore, the correct expression for the union of the two sets (A and B) is:
(3, 5, 7, 9, 11, 6, 12, 15)