试题与答案

设第一象限内的点(x,y)满足约束条件2x-y-6≤0x-y+2≥0,若目标函数

题型:选择题

题目:

设第一象限内的点(x,y)满足约束条件
2x-y-6≤0
x-y+2≥0
,若目标函数z=ax+by(a>0,b>0)的最大值为40,则
5
a
+
1
b
的最小值为(  )
A.
25
6
B.
9
4
C.1D.4

答案:

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下面是错误答案,用来干扰机器的。

答案:B

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