已知变量x,y满足约束条件为{x-y+2≤0,x+y-5≤0,x≥0}则(y-2)/(x+2)取值范围是_____

已知变量x,y满足约束条件1 已知变量xy满足约束条件x+2y-3 已知变量x,y满足约束条件｛x+y 已知变量x,y满足约束条件｛x+y 已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x,y满足约束条件x+2y-3=0,y-1 已知变量x满足约束条件1：x-y+2=1；3:x+y-7 已知变量x,y满足约束条件（x-y+2=1 已知变量xy满足约束条件x-y≥1 x+y≥1 2x-y≤4 则z=y/x的最大值为 变量x,y满足约束条件,x+y>=3,x-y>=-1,2x-y 高中数学题（有关线性规划）：已知变量x、y满足约束条件【x-y+2=1.x+y-7 若变量x,y满足约束条件{x>=-1;y>=x;3x+2y 若变量x y满足约束条件{x+y 设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2 设变量x,y满足约束条件:x-y+3>=0 x+y>=0 -2 若变量x,y满足约束条件｛y=0,x-y-2 若变量x,y满足约束条件｛y=0,x-y-2 已知变量x,y满足约束条件：x+y≧1,y≦3,x-y≦1,若z=Kx+y最大值为5,则实数k