设集合U={（X,Y）|2x-y+m>0},A={(x,y)|2x-y+m>0},B={(x,y)|x+y-n≤0},求使点P（2,3)∈A∩CuB的充要条件,并说明理由.

Question

设集合U={（X,Y）|2x-y+m>0},A={(x,y)|2x-y+m>0},B={(x,y)|x+y-n≤0},求使点P（2,3)∈A∩CuB的充要条件,并说明理由.

Answer 1

设集合U={(x,y)|x∈R,y∈R},A={(x,y)|2x-y+m>0},B={(x,y)|x+y-n≤0},那么点P(2,3)∈A∩( CUB)的充要条件是
A.m>-1,n