Exercise 69 Page 300

Since we have the symbol ⋃, we are looking for the union of the given sets. A&={1,2,3,4} C&={3,5,7,8} 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 there is any element existing in both sets, we will only include it once in the union. A&={1,2,3,4} C&={3,5,7,8} A ⋃ C &={1,2,3,4,5,7,8}