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[GRE数学] 新GRE数学要点:In Terms of

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发表于 2012-8-15 12:55:17 | 显示全部楼层 |阅读模式
 Equation-In Terms of   Given a linear equation of two variables x and y, we can express x in terms of y by isolating x to the right side of the equation and y to the left.. G# X  x8 Z* k6 i; c
  Example:$ I" v' T5 J% P' }
  Given the equation ax+by+c=d,we can express x in terms of y as follows:
! U2 ?% S# F% q6 m% j8 s# L9 m( O  1.ax=d-by-c,by subtracting by+c from both sides
( Z7 @, l- h( \6 L  2.x=(d-by-c)/a,by dividing both sides by a.1 b8 R" W% m' p1 R3 R
  Remember:
0 i, |; H8 c3 B$ M- h* l' z  All linear equations of two variables x and y can be written as ax+by+c=d, and x=(d-by-c)/a.
6 I" p# v% @) u1 o7 R  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。
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