GRE数学考点：Substitution

来源：www.pxwy.cn 发布人：星星

2021-12-09 11:52:09|已浏览：134次

Substitution
Substitution is a method where one or more variables in an expression is replaced by numbers or another set of variables.To evaluate an expression specific numbers are used as substitute. To express in terms of another set of variables, variables are replaced by the new set of variables.
Example:
If x=3, then 2x2+4x+1 can be evaluated by substituting 3 for x.Replacing all x by 3, we get 2*32+4*3+1=31.

If x=2+y, then x2-3 can be expressed in terms of y by replacing all x by (2+y):(2+y)2-3=y2+4y+1.

新GRE数学考点：Substitution

Remember:

Do not forget to replace all occurrences of the variable.

After substitution the variable does not appear anywhere in the expression.

有一部分考生认为新GRE数学具有一定的难度，这其中的原因是由于考生在复习时没有把新GRE数学的基础打牢。想要新GRE数学考好，复习的时候一定要把基本概念和重要考点都弄扎实。祝大家都能取得理想成绩!

本文由培训无忧网新东方教育专属课程顾问老师整理发布，更多GRE考试培训相关课程请关注培训无忧网GRE培训或添加老师微信：15033336050

注：尊重原创文章,转载请注明出处和链接 https://www.pxwy.cn/news-id-6913.html 违者必究！部分文章来源于网络由培训无忧网编辑部人员整理发布,内容真实性请自行核实或联系我们，了解更多相关资讯请关注GRE考试频道查看更多，了解相关专业课程信息您可在线咨询也可免费申请试课。关注官方微信了解更多：150 3333 6050

相关新闻