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
关于充要条件的数学题设集合U={(x,y)|x∈R,y∈R},A={(x,y)|2x-y+m>0},B={(x,y)|x
设全集U={(x,y)|x,y属于R},集合M={(x,y)|(y+2)除以(x-2)=1},N={(x,y)|y不等于
设全集U={(x,y)|x,y属于R},集合M={(x,y)|(y-3)除以(x-2)=1},N={(x,y)|y不等于
设集合A={(x,y)|y≥|x-2|,x>=0},B ={(x,y)|y
已知集合A={(x,y)|x-y+m=0},B={(x,y)|y=√9-x^2}.M交N元素个数
已知集合M={(x,y)|x^2+y^2=0},N={(x,y)||x|+|y|
已知集合m={(x,y)/x平方+2x+y=0},n={(x,y)/y=x+a},且空集是m交n
设集合A={(x,y)|y>=|x-2|,x>=0},B={(x,y)|y
设集合M={(x,y)|x^2+y^2=1.x∈R,y∈R},N={(x,y)|x-y=0,x∈R,y∈R},则集合M∩
已知集合A={(x,y)||x|+|y|≤1},B={(x,y)|(y-x)(y+x)≤0},设集合M=A∩B,则M所对
设全集U={(x,y)|x,y∈R},集合M={(x,y)|y−3x−2=1},N={(x,y)|y≠x+1},则∁U(
已知集合M={y│y=2^x x>0},N={y|y=根号(2x-x^2)}求M交N