x+y-1>=0,x-y+1>=0,4x+y-2>=0.实数x,y满足约束条件,求x-y/x+y取值范围
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?
设变量x,y满足约束条件{x-y≥0,x+y≤1 x+2y≥1 求z=y/x+1的取值范围 z=(x-1/2)^2+y^
已知x,y满足约束条件:x-y+1>=0,x+y-2>=0,x
若实数x,y满足约束条件2x+y≤4,x≥0,y≥0,则目标函数z=(y-x)/(x+1)的取值范围为?
若实数x,y满足约束条件2x+y≤4,x≥0,y≥0,则目标函数z=(y-x)/(x+1)的取值范围
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
设实数x,y满足{x-y-2≤0 x+2y-5≥0 y-2≤0.(1)求z=x+y的取值范围;(2)求u=(x+y)/x
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
设x、y满足约束条件{x≥0 y≥x 4x+3y≤12}则2y+3/x+1的取值范围是?
1.已知实数x、y满足x^2+y^2+4x+3=0求(y-2)/(x-1)的取值范围
已知实数x.y满足x^2 + y^2 -4x=0,求y-1/x+2的取值范围
已知实数X,Y满足X²+Y²+4X+3=0,求Y-2/X-1的取值范围.