GRE数学考点解析-1-智课教育旗下智课教育.pdf

智 课 网 G R E 备 考 资 料 GRE数学考点解析-1-智课教育旗下智课教育 本文重点为考生分享下GRE数学考点解析，大家可以参考以下内容 进行学习，希望大家尽快掌握GRE数学题解析方法，顺利取得高分。 Subtracting Monomials. To subtract a monomial from another of the same variables just subtract the coefficients. Only two like monomials can be subtracted from each other. Example: By subtracting 3x from 4x, we get (4-3)x=x. By subtracting 3xy from 2xy, we get (2-3)xy=-xy. By subtracting bx from ax, we get ax-bx=(a-b)x. Remember: Monomials can be subtracted only if they have the same variables with identical powers. Combinations of Choices If there are n choices for one type and m choices for second type, then number of combinations for both types is the product of choices:n*m. Example: If there are 3 kinds of breads to choose from and 4 kinds of meats, then we can make 3*4=12 different sandwiches. If an alphabet has 26 letters, then the number of possible 2 letter word is 26*26=676.All of them may not be vaild words. Remember: Do not add the choices to get the total combinations. The product rule can be applied to more than two types of choices: if there are 3 kinds of breads, 4 kinds of meats, and 6 kinds of cheeses, then we can make 3*4*6=72 different sandwiches. 以上就是为大家总结的GRE数学题复习方法的相关内容，仅供大家 参考，最后，祝大家考出满意的GRE高分。更多出国考试信息敬请关注 智课教育GRE频道。