1.若实数x,y满足(x-2)2+y2=1,则y/x的取值范围是___
1.若实数x,y满足(x-2)2+y2=1,则y/x的取值范围是___
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
设实数x,y满足x2+y2=1则 xy的取值范围是?
已知实数x,y满足x2+y2=2x,则x2y2的取值范围是______.
已知实数x,y满足x^2+y^2=1,则x+y的取值范围是___;x-√3y的取值范围是___
设实数xy满足x2 +2y2=6,则x+y的取值范围
若实数x,y满足2x2+3y2=1,S=3x2-2y2,则S的取值范围是______.
若实数x,y,z满足x+2y+3z=a( a为常数 ),则x2 + y2 + z2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?
若实数X Y满足y=2x+1,且x小于等于2y大于等于3,则y/x的取值范围是 ?
若实数x,y满足2x*X+3y*y=1,S=3x*x-2y*y,则S的取值范围为
实数x,y满足x2-2x-4y=5,则x-2y的取值范围是 ___ .