新GRE数学相当于中国高中数学的水平，对考生来说没有太大的问题，不过，考生依然要认真对待，以免造成不必要的失分。下面新东方网GRE频道为大家整理新GRE数学备考-交集和并集的相关内容，希望对大家有所帮助.

　　Intersection of two sets is another set with only the members that are in both sets. If the two sets do not share any #mon member， the intersection is the empty set with no member.

　　ceoba.#ple：

　　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 #mon members.

　　Two sets are disjoint if they have no member in #mon， that is they have an empty intersection.

　　Union of Sets

　　Union of two sets is another set with all the members from both sets.

　　大家在备考的时候不妨分考点来复习，将做错的题整理出来，考前一个星期内集中再过一遍。