作者rurrur (儒)
看板GMAT
标题[计量]
时间Tue Nov 25 23:45:43 2008
In the xy-plane, does the line with equation y=3x+2 contain the point (r,s)?
1. (3r+2-s)(4r+9-s)=0
2. (4r-6-s)(3r+2-s)=0
ans: c
这题题意我不太了，我是每个式子求出r s我选d
请帮忙解释解释
谢谢
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.112.5.54
1F：推 sessions503:这题我也蛮好奇的....考点线面概念 11/25 23:51