某租赁公司,购买了一辆小型挖掘机进行租赁.据市场分析,该小型挖掘机的租赁利润
(单位:万元)与租赁年数
的关系为
.
(1)该挖掘机租赁到哪几年时,租赁的利润超过
万元?
(2)该挖掘机租赁到哪一年时,租赁的年平均利润最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb96e691e8af9c859b2676b10df20bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b1b0744ff81805a81c96accd6e8f09.png)
(1)该挖掘机租赁到哪几年时,租赁的利润超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
(2)该挖掘机租赁到哪一年时,租赁的年平均利润最大?
更新时间:2018-07-21 11:07:53
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【推荐2】设函数
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