新GRE數學考點總結例題解析

新GRE數學考點總結例題解析

　　gre考試分為寫作、閱讀和數學等多個部分，出國gre頻道根據gre考試題型構成，為各位考生提供了這幾個方向的復習資料，歡迎大家參考借鑒。

　　新GRE數學考試要求的是中學的數學知識，考生們對于新GRE數學上面來說還是比較有把握，不過說到具體的GRE數學考點要求就不一定這么清楚。下面就為大家介紹新GRE數學考點及這些GRE數學考點解析，幫助考生們系統的復習一遍新GRE數學，梳理整合新GRE數學考試所需要的知識。

　　GRE考試數學考點：Subtracting Monomials

　　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.

　　GRE考試數學考點：Combinations of Choices

　　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.

　　以上就是新GRE數學考點及GRE數學考點解析的介紹，希望這些知識點的介紹可以幫助大家復習新GRE數學，為大家復習新GRE數學提供條件。希望考生們認真復習新GRE數學考試，能夠取得自己理想的成績。

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