画出x-y+5≥0,x+y≥0,x≤3三者的图象可知：-2.5≤x≤3,-3≤y≤8
所以,
x=3,y=8时umax=x²+y²=3²+8²=73
x=0,y=0时umin=x²+y²=0
x=3,y=-3时,vmax=-3/(3-5)=1.5
x=3,y=8时,vmin=8/(3-5)=-4
设x、y满足条件x-y+5>=0,x+y>=0,x
1个回答
相关问题
-
设变量x,y满足约束条件y>=0.x-y+1>=0.x+y-3
-
设x,y满足约束条件{x>=0,y>=x,4x+3y
-
设实数x,y满足约束条件x-y-2=0,y
-
已知X,Y满足约束条件x-y+5>=0 x+y>=0 X
-
x,y满足约束条件x+y>5,x-y+5≥0,x≤3
-
设实数x,y满足x+y-5>0,2x+y-7>0,且x≥0,y≥0
-
设xy满足约束条件x>=0 y>=0 4x+3y=0
-
设实数X,Y满足约束条件（x-y+2≥0 x+y-3≤0 x≥0 y≥0 求Z=2x+y的最大值=?
-
实数x,y满足约束条件.求范围实数x,y满足约束条件x-y+2>=0 x+y-4>0x
-
当x,y满足条件x>=0,y