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數學達人:新GRE《OG》數學題精選及解答.

2017/08/10 01:26:33 編輯: 瀏覽次數:284 移動端

The figure above shows the graph of a function f, dined by f(x)=|2x|+4 for all numbers x. For which of the following functions g dined for all The figure above shows the graph of a function f, dined by f(x)=|2x|+4 for all numbers x. For which of the following functions g dined for all numbers x does the graph of g intersect the graph of f ?

  A g(x)=[1]x–2

  B g(x)=[1]x+3

  C g(x)=[1]2x – 2

  D g(x)=[1]2x+3

  E g(x)=[1]3x – 2

  這個題就是問兩個函數圖象相交的問題,根據觀察,要與這個折線相交的直線的斜率滿足的條件是要么是正斜率比2大,要么是負斜率比-2小,因此只能選E了。獲得更多gre考試咨詢點擊進入>>>>澳際免費咨詢顧問或聯(lián)系QQ客服:800004500

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