Associative Law Like real numbers, the grouping does not affect the product or sum of 3 or more algebraic terms. - X7 N) k3 n2 F( Y# K+ u8 q/ ?7 S Example: + X) ^& I6 l6 @9 u Sum:2x2+(4y+1)=(2x2+4y)+1, 0 S: b8 v4 h( e6 L# `* @ 3x+(2xy+5y+2)=(3x+2xy)+(5y+2)=(3x+2xy+5y)+2.. \$ i! W% ?' x5 f5 I8 i
Product:3x*(2y*4xy)=(3x*2y)*4xy=3x*2y*4xy. * N% A5 N5 U+ x: p$ M I7 ? Remember:* d! J* U0 I4 ^5 W h$ T" ^2 ^
Typically, same variable is grouped together in a single term and the product of same variable is expressed as power.. [% `* @3 T0 g$ V" x
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。