x、y∈R,A={(x,y)|x2+y2=1},B={(x,y)| =1,a>0,b>0},当A∩B只有一个元素时,a,b的关系式是_________B的是x/a-y/b=1

1.已知集合a=(x,y)/x,y∈R 且x2+y2=1 已知集合a=(x,y)/x,y∈R,且x1.已知集合a=(x,y)/x,y∈R 且x2+y2=1已知集合a=(x,y)/x,y∈R,且x2+y2=1 B=（x,y）/x,y∈R,且y=x则A∩B的元素个数为 已知x,y∈R,求证x2-xy+y2>=x+y-1 已知x,y∈R,且x2+y2 已知集合a=(x,y)/x,y∈R 且x2+y2=1已知集合a=(x,y)/x,y∈R,且x2+y2=1 B=（x,y）/x,y∈R,且y=x则A∩B的元素个数为抱歉没有悬赏了~ 设x,y,z∈R+,求证 2z2-x2-y2/(x+y)+2x2-y2-z2/(y+z)≥x2+z2-2y2/(x+z) 设x,y,z∈R+,求证 2z2-x2-y2/(x+y)+2x2-y2-z2/(y+z)≥x2+z2-2y2/(x+z) x2+xy+y2=1,且x,y∈R,则x2+y2的取值范围 求最值 若x,y∈R,且3x2+2y2=6,求x2+y2最大值和最小值. x2+x+y2/x+y 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是多少 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的元素交集个数为? 若x,y∈R+且x2+y2/2=1则x√（1+y2）的最大值x2与y2表示平方 已知x.y∈R,求证x2+y2+1≥x+y+xy 已知x,y∈R,求证（x2+y2）2≥xy(x+y)2 已知X,Y,Z∈R,且X+Y+Z=1,求证X2+Y2+Z2≥1/3 x2+xy+y2=1,且x,y∈R,则x+y的取值范围 集合M={(x,y)|x2+y2=1},N=|(x,y)|x/a+y/b=1,a∈R,b∈R},若M交N不=空集,则a,b满足 A.a= x2+y2 xy+x+y-1x y属于R 比较大小 x2+y2 xy+x+y-1