解题方法
1 . 某学校准备购买手套和帽子用于奖励在秋季运动会中获奖的运动员,其中手套的单价为
元,帽子的单价为
元,且
.现有两种购买方案
.
方案一:手套的购买数量为
件,帽子的购买数量为
个;
方案二:手套的购买数量为
件,帽子的购买数量为
个;
(1)采用方案一需花费
,采用方案二需花费
,试问采用哪种购买方案花费更少?请说明理由;
(2)若
,
,
,
满足
,
,求这两种方案花费的差值
的最小值.(注:差值
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54de564e53ed78b21512cc722cf0218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650b262681fdf608130ab36553b24009.png)
方案一:手套的购买数量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
方案二:手套的购买数量为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)采用方案一需花费
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3f53300c959a34a5f46bb01d14f82f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6615a400b8698dbec1b763e391251f7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efa8d99157a149e49eb50f4d7274ee9.png)
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