圆x^2+y^2-2x-2y-2=0上至少有三个不同的点到直线y=kx的距离为1.则K的范围是什么?

x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 M(x,y)在圆x^2+y^2=1上移动,求点Q(x(x+y),y(x+y))的轨迹 已知x>0,Y>0,如何证x^2/y+y^2/x>=x+y (X,Y) f(x,y)={12y^2,0 x*x+2x+y*y-4y+5=0 x= y= 点(x,y)在圆x^2+y^2-6x-6y+12=0上,求x^2+y^2的最值 点p(x,y)在圆x^2+y^2-6x-6y+12=0上,求x^2+y^2最值如题 设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 已知p（x,y)为圆x^2+y^2-6x-4y+12=0 上的点,求Y/X的最大值和最小值 已知点P(x,y)是圆x^2+y^2-6x-4y+12=0上的动点,求x+y的最值 点p(x,y)在圆x²+y²-2x-2y+1=0上则x+1/y的最小值 已知P（X,Y）在圆X^2+y^2-6X-6y+14=0上,求x+y的最值 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 因式分解x(x+y)(x-y)-x(x+y)^2 若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值