标题: an question [打印本页] 作者: brigittew 时间: 2002-11-8 17:51 标题: an question
35、DS:一个点(R,S)是否在2X+3Y小于等小6的区域内。(1),直线3X+2Y=0经过该点;(2),R小于等于3,S小于等于2。老机经的答案好像是C,但我选了E。
[讨论]不知道B怎么样?是这个直线方程吗?
can anyone give an explaination of the problem?
here is my understanding :
if my understanding is mistake please let me know, i think the dot[upload=jpg]uploadImages/200211817512723224.jpg[/upload](r,s) is defined on the bold segment作者: 阳光下 时间: 2002-11-9 10:06