GRE必备之新GRE数学考试重点介绍
自从新GRE改革以来,新GRE考试无论是在写作、语文上还是数学上都有了很大的变化,以下便是新GRE数学考试重点介绍。
新版GRE数学复习重要考点:Sum of Arithmetic ProGREssion
The sum of n-numbers of an arithmetic proGREssion is given by
S=nxdn/2
where x is the first number and d is the constant increment.
example:
sum of first 10 positive odd numbers:101+2109/2=10+90=100
sum of first 10 multiples of 7 starting at 7: 107+7109/2=70+315=385
remember:
For a descending AP the constant difference is negative.
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。
AP
Average of n numbers of arithmetic proGREssion is the average of the
smallest and the
largest number of them. The average of m number can also be written as
x + d/2.
Example:
The average of all integers from 1 to 5 is /2=3
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