设集合 A={(x,y)|m/2<=(x-2)^2+y^2<=m^2} B={(x,y)|2m<=
设集合A={(x,y)|m/2<=(x-2)^2+y^2<=m^2}B={(x,y)|2m<=x+y<=2m+1}A与B的交集不为空集,求实数m的取值范围...
设集合 A={(x,y)|m/2<=(x-2)^2+y^2<=m^2} B={(x,y)|2m<=x+y<=2m+1} A与B的交集不为空集,求实数m的取值范围
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