已知实数x,y满足x^2+y^2-4y+1=0,则y/x的取值范围是.
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
已知实数x,y满足x^2+y^2-6x-8y+24=0,则3x+4y-10的取值范围是
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
已知实数xy满足x/y=x-y,且y>1,则实数x的取值范围是
已知实数x,y满足x^2+y^2+4x-2y-4=0,则x^2+y^2的取值范围是多少
已知实数x、y满足条件x^2+y^2-2x+4y=0,则x-2y的取值范围
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足4x+3y-12=0,则a=x^2+y^2的取值范围是
已知实数x,y满足(x+2)^2+(y-3)^2=1,则3x+4y-26的取值范围是
若实数x,y满足x^2+y^2-6x-4y+12=0,则x^2+y^2的取值范围是
设实数x,y,满足[(x^2)/16]+[(y^2)/9]=1,则[(y-4)/x](x≠0)的取值范围是?
已知实数x,y 满足x^2+y^2=1,求(y-2)/(x+1)的取值范围