1. 长方形ABCD, 中间(任意）有一点o, 连接OA,OB,OC,OD,其长度分别用X,Y,Z,W来表示，求W^2如何表示？
高手们，怎么解答!
37. x，y都是正数。x^3是否大于y
1) X根号>Y
2) X^2>Y
确认: E
38. m 是75，98，140 的公倍数，问那个正确
(a)m为27的倍数 (b)m为49的倍数 (c)m大于14000
确认: b only
14. If K is common multiple of75, 98 ,140, which of the following must be true?
Ⅰ. K is a multiple of 9
Ⅱ. K is a multiple of 49
Ⅲ. K is greater than 14000
确认：Ⅲ对
2.当r>1, r*=1-1/r，求r>2时(r-1)*
确认：1－1/r-1
思路：r-1>1, 带入
3.7x+3y=1,求直线斜率
答案确认：－3/7
37. I think E is right.
38 and 14 are the same questions, and I think both II and III are correct. Right?
2.how to solve this?
Thank you
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[此贴子已经被作者于2002-12-26 11:07:46编辑过]
[此贴子已经被作者于2002-12-27 4:54:58编辑过] | 
