变量x,y满足{x-4y+3≤0 3x+5y-25≤
已知变量x,y满足3个不等式分别是x-4y+3≤0,3x+5y-25≤0,x≥1,z=x²+y².
若变量x,y满足约束条件-1≤x:x≤y;3x+2y≤5,则z=2x+y的最大值为
设z=2x+y,变量x,y满足条件x−4y≤−33x+5y≤25x≥1
设变量x,y满足约束条件x+y≤3x−y≥−1y≥1
若变量x,y满足约束条件x+y≤2x≥1y≥0
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>-1,x+y>1,3x-y
设变量xy满足 x+y-3 x-y+1 3x-y+5 z=x+y/x
设变量xy满足约束条件x-y≥0,x+y-2≥0,3x-y-6≤0则目标函数z=2x-y
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥1
若变量x,y满足约束条件3≤2x+y≤96≤x−y≤9
若实数x,y满足x-4y+3≤0,3x+5y-25≤0,x≥1,则2x-y的最大值是多少