A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0
集合A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0
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集合A={(x,y)|y=-x2+mx-1},B={(x,y)|y=3-x,0≤x≤3}.
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1.集合A={(x,y)│y=-x^2+mx-1},B={(x,y)│y=3-x,0≤x≤3},若A∩B是只有一个元素的