若xy满足1≤x-2y≤2和2≤x+5y≤-1,则5x+11y的取值范围?

若xy满足1≤x-2y≤2和2≤x+5y≤-1,则5x+11y的取值范围? 若x.y属于R,且满足（X*X+Y*Y+2）（X*X+Y*Y-1）-18≤0.求证：XY≤2 若xy满足约束条件x≥-1,y≥x ,3x+2y≤5则/4x-3y+24/的最大值等于 整数xy,满足x的平方+y的平方+1≤2x+2y,求x+y的值 初三的周末练习题,x,y为实数,且x^2+y^2/2+4≤xy+2y,则x,y的值分别是还有一题，能不能顺便看一下实数x,y满足x≥y ≥1 和2x^2-xy-5x+y+4=0 则x+y= 实数xy满足1≤y≤x,且2x²-5x+4=y(x-1),则x+y的值为 求Z=2x+y的最大值,使xy满足约束条件,y≤x,x+y≤1,y≥-11.求Z=2x+y的最大值,使x y满足约束条件,y≤x,x+y≤1,y≥-1 2.求Z=3x+5y的最大值最小值,使XY满足条件 5x+3y≤15,y≤x+1,x-5y≤3求详解,带图最好. 若x.y满足x+=4和x-y=2,求xy分之2x-y+1除以-x分之y+y分之x的值 已知实数x,y满足x2-2xy+4y2-x-2y+1≤0,求x和y的值 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 已知变量xy满足约束条件x≥-1,y≥x,3x+2y≤5,则2x+y的取值范围是 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 若x,y,z满足x2+2y2+z2≤2xy-2y+4Z,求x,y,z 若xy满足x²+2x+y-2√y-1=-1,求xy, 若x,y满足x^+2y^-2xy+1=0,求xy的值 已知xy满足约束条件x+2y-4≤0 x-y-1≤0 x+2≥0求目标函数z=x+2y+2的最大值已知xy满足约束条件x+2y-4≤0 x-y-1≤0 x+2≥0求目标函数z=x+2y+2的最大值和最小值 设xy满足2x+y≥4,x-y≥-1,x-2y≤2,则(x-1)2+(y+1)2最小值是