Question

Suppose L={−4,−2,1,3} and M={−2,3,7}. Which set represents L∪M?

A) {−4,−2,1,3,7}
B) {−4,1}
C) {−2,3}
D) {7}

Answer 1

A : {−4,−2,1,3,7}

Explanation:

The union of two sets L and M represented by L∪M is the set of all elements in either L or M or both but since sets cannot contain duplicates, duplicates are removed. So -2 appears only once in the union of L and M