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新GRE数学考试要点
来源:毕达教育 发布时间:2012-01-13 09:57:35
下面是新GRE数学考试的要点,希望对即将参考GRE考试的考生有所帮助。
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.
预祝各位考生取得好成绩。
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