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.
新gre数学重要考点:Sequence of Numbers
A sequence is a set of numbers that follow a fixed pattern.The fixed pattern can be expressed by an equation or by a property.
Example:
A set of consecutive integers: 1,2,3,4,5
A set of consecutive even numbers:4,6,8,10,12
A set of consecutive prime: 2,3,5,7,11
A set of consecutive power of 2:4,8,16,32,64
Remember:
A sequence can be in ascending or desceding order.
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。
【英文版GRE数学考试重要考点(1)】相关文章:
★ 新gre数学重要考点:Linear Equation of One Variable
最新
2016-03-02
2016-03-02
2016-03-02
2016-03-02
2016-03-02
2016-03-02