若集合M=(x,y)|x+y=0,N=(x,y)|x2+y2=0,x∈R,y∈R,则有( )
设集合M={(x,y)/x2+y2=1,x∈R,y∈R},N={(x,y)/x2-y=0,x∈R,Y∈R},则集合M和N
设集合M={(x,y)|x2+y2=1,x∈R,y∈R},N={(x,y)|x2-y=0,x∈R,y∈R},则集合M∩N
已知集合M={x|x-2>0,x∈R},N={y|y=x2+1,x∈R},则M∪N等于( )
设集合M={x|y2=3x,x∈R},N={y|x2+y2=4,x∈R,y∈R},则M∩N等于( )
已知集合M={y|y=x2+2x-3,x∈R},集合N={y||y-2|≤3},则M∩N=( )
若**M={(x,y)|x+y=0},N={(x,y)|x^+y^=0,x,y∈R},则有( )
已知集合M={y|y=x2-1,x∈R},N={x|y=2-x2},则M∩N=( )
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∩
设全集U=R,集合M={y∈R|y=2x,x>0},N={x∈R|2x-x2>0},则M∩N为( )
设全集U=R,集合M={y∈R|y=2x,x>0},N={x∈R|2x-x2>0},则M∩N为( )
集合M={y|y=x2-1,x∈R},集合N={x|y=9−x
集合M={y|y=x2+1,x∈R},N={y|y=5-x2,x∈R},则M∪N=_______.