为了方便广大考生更好的复习,综合整理了新GRE数学的要点指导:交集和并集,以供各位考生考试复习参考,希望对考生复习有所帮助。愿大家都能取得好成绩,更多有关留学考试的资讯与辅导资料敬请关注留学考试。
IntersectionofSets
Intersectionoftwosetsisanothersetwithonlythemembersthatareinbothsets. Ifthetwosetsdonotshareanycommonmember, theintersectionistheemptysetwithnomember.
Example:
Intersectionof {1,2,3} and {2,3,5} istheset {2,3}。
Intersectionofthesetwithallprimesandthesetwithallevennumbersistheset {2} sinceonly 2 isbothevenandprime.
Intersectionof {1,2,3} and {4,5,6} istheemptyset {}。
Remember:
Intersectioncontainsonlythecommonmembers.
Twosetsaredisjointiftheyhavenomemberincommon, thatistheyhaveanemptyintersection.
UnionofSets
Unionoftwosetsisanothersetwithallthemembersfrombothsets.
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