已知变量x,y满足
则
的值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550140ee75c6759c61a7666d07ba2988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d4e9c84672c94a61bc45d40fd49507.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2013·内蒙古赤峰·一模 查看更多[2]
更新时间:2016-12-02 12:23:52
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【知识点】 求分式型目标函数的最值解读
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