首页 > 学习园地 > 英语学习

新gre数学重要考点:set、排列、组合

雕龙文库

【简介】感谢网友“雕龙文库”参与投稿,这里小编给大家分享一些,方便大家学习。

  2023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。

  Set

  A set is a collection of objects or things. Each object in a set a member or element of that set.Size of a set is the number of members in the set.

  Example:

  The set of even numbers between 2 and 10 is of size 5:{2,4,6,8,10}.

  The set of primes between 2 and 10 is of size 4:{2,3,5,7}.

  Remember:

  Each member of set A belongs to A or is in the set A.

  A set can not have repeating member:{1,3,1,2}is not a set.

  Rearranging the order of the members does not change the set:{1,2,3}is same as{3,2,1}.

  Combinations

  Number of ways we can select n objects from a group of m distinct objects is m!/!).

  Example:

  Number of possible ways to pick 4 oscar nominations from a list of 50 movies is 50!/!)=50!/=50494847/24=230300.

  Remember:

  This does not apply if there are identical objects.

  Permutation of Objects

  The number of ways n distinct objects can be ordered is n!.

  Example:

  Number of ways 6 people can from a queue is 6!.

  Number of ways 5 different cars can be parked in 5 parking spaces is 5!.

  Remember:

  This does not apply if there are identical objects or ordering does not matter.

  由于美国数学基础教育的难度增加导致数学考试越来越难,但新gre数学复习考点都是高中时候学到的知识点,考生不要过于紧张,把基本概念弄明白,再记住一些新版gre数学必备的词汇,那么相信新版gre数学应该没有问题。

  

  2023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。

  Set

  A set is a collection of objects or things. Each object in a set a member or element of that set.Size of a set is the number of members in the set.

  Example:

  The set of even numbers between 2 and 10 is of size 5:{2,4,6,8,10}.

  The set of primes between 2 and 10 is of size 4:{2,3,5,7}.

  Remember:

  Each member of set A belongs to A or is in the set A.

  A set can not have repeating member:{1,3,1,2}is not a set.

  Rearranging the order of the members does not change the set:{1,2,3}is same as{3,2,1}.

  Combinations

  Number of ways we can select n objects from a group of m distinct objects is m!/!).

  Example:

  Number of possible ways to pick 4 oscar nominations from a list of 50 movies is 50!/!)=50!/=50494847/24=230300.

  Remember:

  This does not apply if there are identical objects.

  Permutation of Objects

  The number of ways n distinct objects can be ordered is n!.

  Example:

  Number of ways 6 people can from a queue is 6!.

  Number of ways 5 different cars can be parked in 5 parking spaces is 5!.

  Remember:

  This does not apply if there are identical objects or ordering does not matter.

  由于美国数学基础教育的难度增加导致数学考试越来越难,但新gre数学复习考点都是高中时候学到的知识点,考生不要过于紧张,把基本概念弄明白,再记住一些新版gre数学必备的词汇,那么相信新版gre数学应该没有问题。

  

相关图文

推荐文章

网站地图:栏目 TAGS 范文 作文 文案 学科 百科