Question

Question Help Let D equals =​{ 16​, 19​, 21​}, E equals =​{ 16​, 18​, 19​, 20​} and F equals =​{ 15​, 17, 18​, 19​, 21​}. List the elements in the set D U E

Answer 1

D U E = { 16, 18, 19, 20, 21 }

Explanation:

The symbol U means union of sets.

In union, we take all of the elements of both the sets.

Set D has elements { 16, 19, 21 } and set E has elements { 16, 18, 19, 20 }.

So, we take all their elements for union. The common elements of both the sets are written once.

Therefore, the elements in the set D U E are { 16, 18, 19, 20, 21 }