若实数xy满足x-y+1≥0,x+y≥0,x≤0,则z=3“x+2y的最小值是多少

若实数xy满足x-y+1 若实数xy满足x-y+1≥0,x+y≥0,x≤0,则z=3“x+2y的最小值是多少 若实数xy满足x-y 1≥0,x y≥0,x≤0,则z=3“x 2y的最小值是多少 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2x²-xy-5x+y+4=0求x+y之值 实数X、Y满足X≥Y≥1和2X^2-XY-5X+Y+4=0,则X+Y= 若实数x,y满足x^2-xy-y^2 =0,则x/y=? 若实数xy满足约束条件x≥0 y≥0 x+y≤1 则Z=2x+y最大值为 已知实数x、y满足xy>0,且8/xy+1/x+1/y=1, 若实数xy满足x≥y≥2,且2x²-xy-8x+2y+9=0,则根号xy的值 若实数xy满足不等式组x-2y≥0,x+y-3≥0,x-y-3≤0,则2x-y的最小值为? 若实数xy满足不等式组x-2y≥0,x+y-3≥0,x-y-3≤0,则2x-y的最小值 若实数xy满足（x+y+2)(x+y-1)=0,则x+y的值是 已知实数x,y满足2x-y≥0 x≤1 x+y+1≥0 则z=x^2-2xy+y^2已知实数x,y满足2x-y≥0 x≤1 x+y+1≥0 则z=x^2-2xy+y^2 的最大值 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 若实数X,Y满足约束条件：X+2Y-5≤0,X≥1,Y>0,X+2Y-3≥0,那么Z=X²+Y²/XY的最小值为 已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy 已知实数xy满足 4x+y-9>=0 x-y-1