惨败，数学+作文 寂静。已添加作文jj

三战550  一战550 ，二战560 ，彻底疯了。 准备还是要再战一下。   好好总结失败的原因。    祝各位一次成功吧！

9.25 添加想起来的数学寂静

a b c d 代表四个数 2 3 6 8  问 (a*b)/c/d的最小值   这个是在前10里面的  我做的是1/4   

作文jj

AA

 The following appeared in a memorandum from the development director of the Largo Piano Company.

“The Largo Piano Company has long been known for producing carefully handcrafted, expensive pianos used by leading concert pianists. During the past few years, however, our revenues have declined; meanwhile, the Allegro Musical Instrument Company introduced a line of inexpensive digital pianos and then saw its revenues increase. In order to increase Largo’s sales and in fact outsell Allegro, we should introduce a line of digital pianos in a variety of price ranges. Our digital pianos would be likely to find instant acceptance with customers, since they would be associated with the prestigious Largo name.”

AI

 “Technology ultimately separates and alienates people more than it serves to bring them together.”

Discuss the extent to which you agree or disagree with the opinion stated above. Support your position with reasons and/or examples from your own experience, observations, or reading.

数学jj

1. （根下x^4-2*x^2*y^2+y^4）/(x-y)  答案: （x+y)

2. 2^16*5^10  问
   the sum of each units 我选的是10

3. slope is -5/3（数可能记不清了）,  ask u/v=

上面有两点  其中一点坐标是（2u，3v），另一点是（3u，5v）（这个点记不清了，上个点肯定正确。

4. DS 一个四边形，问角BCD的度数

（1）AB平行CD

（2）∠BCD=20（数记不清楚了）  选C

6. 有个人走100mile的路，前一半速度是40，后一半是60，问平均速度。

7. 有两个人H和S，放学回家，问谁先到家。

（1）H比S的家远30mile，

（2）S的速度是H的90%

中间那点是F,D是AB的中点，E是BC的中点

知道AFC的面积是1，求ABC的面积。

因为有图 我做了个word文档，但不能上传，我就先传到网盘吧，http://d.namipan.com/d/64b6d211824cae8a6b595e8f08c99a65f9eba2dd00900000

今天才知道，word画图不容易啊

作文jj，我找一下对应的题，找好了发上来！

赞！楼主辛苦了。另外，“2^16*5^10  问
   the sum of each units”  这个sum不止10吧。5^10 很大阿

很俗的一句话

阳光总在风雨后

第八题答案是三，延长BF交AC于G，那么G点必定是AC的中点（中线定理）

设三角形AFD面积为x，那么S ADC=X+1

同理S ABE=X+1 SAEC=X+1  S ABG= S BGC= X+1

S BDEF=1 因为S AFG=S CFG =1/2

而S BGC=X+1

那么S BFE=1/2

S BFE= S FEC=X

所以X=1/2

S ABC=2X+2=3

以下是引用kangaroo823在2009/9/24 20:09:00的发言：
2^16*5^10  = 2^6*10^10=640000000000(10个0）  这样不应该是12么~~~？

可能我没说明白   求的是每个数位上的数的和