设集合A={(x,y)/x+3y=7},集合B={(x,y)/x-y=-1},则A并B=
人气:113 ℃ 时间:2020-05-25 05:39:19
解答
A∪B={(x,y)/x+3y=7,或 x-y=-1}
A∩B={(1,2)}
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