Question

what is relationship between <a and <b?​

Answer 1

Answer:

The variables A and B must also represent empty sets as well. The union of Set A and Set B, represented by this expression, is also an empty set with no members. The intersection of Set A and Set B is also an empty set. The Set AB, the set created by the joining of Set A and Set B is also an empty set with no members.

Answer 2

they r variables which represent equation