设xy满足2x+y≥4,x-y≥-1,x-2y≤2,则(x-1)2+(y+1)2最小值是

设xy满足2x+y≥4,x-y≥-1,x-2y≤2,则(x-1)2+(y+1)2最小值是 设xy满足约束条件x-ay≤2 x-y≥-1 2x+y≥4 若z=x+y既有最大值又有最小值设xy满足约束条件x-ay≤2 x-y≥-1 2x+y≥4 若z=x+y既有最大值又有最小值 求实数a范围 设实数xy满足y≥x＋1 2y-4x-1≤0 2y＋x－11≤0,设实数xy满足y≥x＋1 2y-4x-1≤0 2y＋x－11≤0,则y²/x的取值范围 设实数x,y满足x^2+2xy+4y^2=1,则x+2y最大值 设xy满足约束条件,1≤x,x+y≥2,y≥3x-6,则z=2x+y最小值 设xy满足约束条件x≥0,x≥y,2x-y≤1,求z=3x+2y的最大值 设变量xy满足约束条件x+y≥3,x-y≥-1,2x-y≤3,则目标函数z=x2+y2的最大值为 实数x'y满足x≥y≥1和2x^2-xy-5x+y+4=0求x'y的值 实数X、Y满足X≥Y≥1和2X^2-XY-5X+Y+4=0,则X+Y= 实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值 设x、y满足{2x+y≥4,x-y≥-1,x-2y≤2,则z=x+y 设实数x,y满足2x+y≤4,x-y≥-1,x-2y≤2,则z=x+y的最大值为 设x,y满足10x^2-16xy+8y^2+6x-4y+1=0,则x-y=? 设变量x y满足约束条件x-y≥-1 x+y≥1 2x-y≤1 z=(x-2y)/(x+y)的最大值 一道线性规划题设变量XY满足约束条件x-y≥-1,x+y≥1,2x-y≤1.则目标函数z=x-2y/x+y的最大值为? 设xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y 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 设实数x,y满足x-y-2≥0,x+2y-4≥0,2y-3≤0(1)2x+y的最小值为