GRE数学备考全新攻略 2016考生必备考试知识点大盘点

2024-04-27

来源: 易伯华教育

GRE数学备考全新攻略 2016考生必备考试知识点大盘点

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对于新GRE考试,跟大家分享一下关于新GRE数学四大复习重要考点:

新GRE数学考试复习重点一: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:{1,3,1,2is not a set.Rearranging the order of the members does not change the set:{1,2,3is same

as{3,2,1. 新GRE数学考试复习重点二:Combinations Number of ways we can select n objects from a group of m distinct objects

GRE数学备考全新攻略 2016考生必备考试知识点大盘点

is m!/(n!*(m-n)!).Example:Number of possible ways to pick 4 oscar nominations from a list of 50

movies is 50!/(4!*(50-4)!)=50!/(4!*46!)=50*49*48*47/24=230300.Remember:This does not apply if there are identical objects.

新GRE数学考试复习重点三: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. 新GRE数学考试复习重点四:Permutation with Selection The number of ways n objects drawn from a collection of m distinct objects

can be ordered is m!/(m-n)!.Example:Number of ways a queue of length 3 can be formed from a group of 5 people

is 5!/(5-3)!=5!/2!=5*4*3=60.Number of possible top ten list for 150 movies is 150!/(150-10)!.Remember:This does not apply if there are identical objects or ordering does not

matter.

以上就是跟大家分享的关于新GRE数学考试的复习重点四要点,希望对大家有所帮助!最后预祝大家在GRE考试中取得佳绩!

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