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楼主: cd小兵

[原创]GMATPrep 数学讨论题库汇总(II)

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发表于 2006-8-22 18:02:00 | 显示全部楼层

2>写错了,

是2>,X<0,Y<0,and X<Y,

so sorry!

发表于 2006-8-22 18:06:00 | 显示全部楼层

不好意思2>写错了

2>,X<0,Y<0,and X<Y

so sorry!

发表于 2006-9-15 16:45:00 | 显示全部楼层
为什么一道题会有好多重复阿?
发表于 2007-7-4 19:20:00 | 显示全部楼层
图看不清啊……
发表于 2008-9-12 12:31:00 | 显示全部楼层
图看不清啊……
发表于 2008-11-20 00:08:00 | 显示全部楼层

27.    3330-!-item-!-187;#058&003295

38, 69, 22, 73, 31, 47, 13, 82

Which of the following numbers is greater than three-fourths of the numbers but less than one-fourth of the numbers in the list above?

 

(A) 56

(B) 68

(C) 69

(D) 71

(E) 73

     請問一下 可以教我解這題ㄇ

发表于 2008-11-20 09:27:00 | 显示全部楼层

27.    3330-!-item-!-187;#058&003295

38, 69, 22, 73, 31, 47, 13, 82

Which of the following numbers is greater than three-fourths of the numbers but less than one-fourth of the numbers in the list above?

解答:这题排序就好了,13,22,31,38,47,69,73,82;

大于其中3/4,就是大于前6个数,小于1/4,就是小于前两个数,那就是69到73之间,所以选D,71

发表于 2009-6-9 16:52:00 | 显示全部楼层
以下是引用xueyumumu在2006-8-22 18:00:00的发言:

我这人笨一点,给个解,你看行不?

because X/Y>1,so that

1>.X>0,Y>0.andX>Y

2>.X<0,Y<0,andX>Y.

but for2X-2Y>1,so X>Y,

if the both 2X-2Y>1andX/Y>0 are right.then,only the condition 1> is right,

so that,both X and Y are all positive.

我也来一个思路 条件一 可以得出 x,y为正且x>y,或者x正y负且x<y

条件二可以得出xy同号且x>y

综合一二可以得出xy为正

发表于 2012-11-12 21:20:55 | 显示全部楼层
图片不存在??
发表于 2022-1-15 00:57:41 | 显示全部楼层
cd小兵 发表于 2006-5-12 08:27
314。For which of the following functions is f(a+b)=f(b)+f(a) for all positive numbers a and b?A. f( ...

麻竹
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