Question

If a set is a subset of another set, what
will be their union?​

Answer 1

Step-by-step explanation:

The union of two sets creates a set that contains one copy of each unique element from each of those two sets. Example: if and , then the union of and is . Note that the set containing , that is , is different from itself — hence both of those are included in , but since appears in both and it appears once in 

Answer 2

Answer:

let A={1,2,3,4} and B={2,3} (since B is subset ofA)

Therefore,AUB=A