Question

If A is a subset B then AUB is

Answer 1

AUB is all the elements of A and B

Answer 2

solution

AUB = B
because all elements of A in B . According to the difinition of union of sets if two sets having operation union then results sets is all elements of both the sets but taking common element in one time
In the same way if A is the subset of B means all elements of A in B and if union it ,then answer is the B



I hope this will help u.