词汇永远是考试高分的基础，词汇量达到了就很容易理解试题的意思，从而答题效率也会事半功倍。出国留学网GRE栏目为大家整理了GRE数学重要考点词汇，希望能有所帮助哦!
GRE数学重要考点词汇
GRE数学词汇大全——有关分数和小数：
proper fraction真分数
improper fraction假分数
mixed number带分数
vulgar fraction，common fraction普通分数
simple fraction简分数
complex fraction繁分数
numerator分子
denominator分母
(least)common denominator(最小)公分母
quarter四分之一
decimal fraction纯小数
infinite decimal无穷小数
recurring decimal循环小数
tenths unit十分位
GRE词汇栏目推荐：
...2014年GRE考试时间 2014GRE考试时间出来啦,出国留学网GRE频道小编特地来为大家整理了2014年GRE考试时间,以供大家参考,合理安排自己的复习时间。
新gre数学重要考点：Multiplying Polynomials
Multiplying Polynomials
To multiply two polynomials, open up the first polynomial and multiply the second polynomial with each term.
Example:
If we multiply (3x+2) and (4x2-x+2),we get (3x+2)(4x2-x+2)=3x(4x2-x+1)+2(4x2-x+2)=12x3-3x2+3x+8x2-2x+4=12x3+(-3+8)x2+(3-2)x+4=12x3+5x2+x+4.
Remember:
Do not froget to multiply all the terms.
Repeat distributive law when multiplying polynomials.
新gre数学重要考点：Subtracting Polynomials
Subtracting Polynomials
To subtract polynomial from another, subtract the like terms. Like terms are those with the same variable and identical power.
Example:
By subtracting (3x+2) from (4x2-x+2),we get 4x2+(-1-3)x+(2-2)=4x2-4x.
Remember:
Only subtract the like terms.
新gre数学重要考点：Adding Polynomials
Adding Polynomials
To add two polynomials, add the like terms. Like terms are those with the same variables and identical powers.
Example:
By adding (3x+2) and (4x2-x+2), we get 4x2+(3x-x)+(2+2)=4x2+2x+4.
Remember:
Only add the like terms.
新gre数学重要考点：Polynomials
Polynomials
Any expression with one or more terms is called polynomial.
Example:
3x+2,4x2-x+2,and 4x+3xy+y2are all polynomi...
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!/(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.
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.
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