Let D = (2,5,7), E = (2,4,5,6), and F = (1,3,4,5,7)

List elements in the set D U E.

D U E = (2, 4, 5, 6, 7)

Step-by-step explanation:

Given

D = (2,5,7),

E = (2,4,5,6)

F = (1,3,4,5,7)

Required

Elements of D U E

In set notations, when U is used, it means union and it implies the totality of all sets without repetition.

So, given that D = (2,5,7) and E = (2,4,5,6)

D U E = (2,5,7) U (2,4,5,6)

Merge Sets

D U E = (2,5,7, 2,4,5,6)

Remove Repetitions

D U E = (2,5,7,4,6)

Arrange in ascending order

D U E = (2, 4, 5, 6, 7)

Hence, the elements in set D U E are (2, 4, 5, 6, 7)