若1≤x+y≤3,-1≤x,y≤1,求4x+2y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≤x+y≤3 已知 {-1≤x-y≤1求Z=4x+2y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
定义运算X#Y= X(X≤Y) Y(X>Y)若|m-1|#m=m,求m的取值范围.
已知实数x,y满足(x-y+6)(x+y-6)≥0,1≤x≤4,(1)求x^2+y^(2)-2的取值范围,(2)求y/(
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^
问:(1)已知实数x,y满足不等式x^2-2x≥y^2-2y,若1≤x≤4,求y/x的取值范围;
(1)已知实数x,y满足不等式x²-2x≥y²-2y,若1≤x≤4,求y/x的取值范围;
已知x,y同时满足条件2x+5y≥10,2x-3y≥﹣6,2x+2y≤10,求y+1/x+1的取值范围 就要结果
已知x,y同时满足条件2x+5y≥10,2x-3y≥﹣6,2x+y≤10,求y+1/x+1的取值范围
已知{2≤x+y≤5,-1≤x-y≤3}求3x+2y的取值范围
满足约束条件x-y≥-1,x+y≤3且x、y非负的Z=x-2y的取值范围?