Chapter P - Preliminary Concepts - P.1 - Sets and Geometry - Exercises P.1 - Page 7: 20

a) Equivalent b) Intersect

a) We see that set A and set B contain all of the same values, so we say that they are equivalent sets. b) We see that both sets contain some of the same points, but not all of the same points. We also see that one set is not contained within the other, so they are NOT subsets. Rather, we see that this is an example of sets which intersect.