Since we have the symbol ⋃, we are looking for the union of the given sets.
First, we will write D in roster form.
D={1, 3, 5, 7, 9}
A union of two sets is the set that contains allelements found in both sets. Therefore, the union of A and D holds all elements that are in both A and D. Note that a union only contains unique values, so if any elements exist in both sets, we will cross out the duplicates.
D&={1, 3, 5, 7, 9}
A&={1,3,4}
A ⋃ D &={1, 3, 4, 5, 7, 9}
