已知x-y+2≥0,x+y-4≥0,2x-y-5≤0,求z=(2y+1)÷(x+1)的范围

2024-11-08 22:47:52
推荐回答(1个)
回答1:

解:∵x-y+2≥0
∴x-y≥-2
又∵x+y-4≥0
∴x+y≥4
又∵2x-y-5≤0
∴2x-y≤5
∴2y+1>0
x+1<0
∴z=(2y+1)÷(x+1)
z<0