In following question indicate whether the two sets are equal.
1. F = {x: x is a natural number greater than 6},
G = {7, 8, 9, . . . . . }
2. From the following list of sets, indicate which pairs of sets are disjoint.
A = {1, 2, 3, 4}
B = {x: x is a natural number greater than 4}
C = {4, 5, 6, . . . . }
D = {1, 2, 3}
3. If A and B are disjoint sets, what does A ( B equal?