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新gre考试实施以来，不仅对写作部分茫然不知所措，就连我们所擅长的数学也甚是担忧，相信这其中的原因还是由于考生在新gre数学复习时没有把基础打牢。如果新版gre数学基本考点都没有复习到，如何能拿到分数呢?所以说，想要新版gre数学考好，复习的时候一定要把基本概念和重要考点都弄扎实。 Intersection of Sets Intersection of two sets is another set with only the members that are in both sets. If the two sets do not share any common member, the intersection is the empty set with no member. Example: Intersection of {1,2,3} and {2,3,5} is the set {2,3}. Intersection of the set with all primes and the set with all even numbers is the set {2} since only 2 is both even and prime. Intersection of {1,2,3} and {4,5,6} is the empty set {}. Remember: Intersection contains only the common members. Two sets are disjoint if they have no member in common, that is they have an empty intersection. Union of Sets Union of two sets is another set with all the members from both sets. Example: Union of {2,3,5} and {1,3,4} is the set {1,2,3,4,5}. Union of {1,2,1} and {1,2} is the set {1,2,1}. | 
