Exercise 11 Page 218

Since we have the symbol ⋃, we are looking for the union of the given sets. A&={1, 3, 4} C&={2, 5, 7, 10} A union of two sets is the set that contains all elements found in both sets. Therefore, the union of A and C holds all elements that are in both A and C. Note that a union only contains unique values, so if any elements exist in both sets, we will cross out the duplicates. In this case, A and C do not hold any common elements. Therefore, we do not have to cross out anything. A ⋃ C={1, 2, 3, 4, 5, 7, 10}