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标题: 一道很有疑问的数学题,请大家来帮帮我 [打印本页]

作者: dongziyuan    时间: 2008-1-4 19:27     标题: 一道很有疑问的数学题,请大家来帮帮我

in the xy-plane,region R consists of all points(x,y) such that 2x+3y=6. is the point(r,s) in region R?

(1) 3r+2s=6

(2)r=3 and s=2

答案是E

我选择的B,我觉得B不能满足region R也是一种否定形式啊,请大家帮我解释一下






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