已知函数
,
.
(1)当
时,求
的值域;
(2)设
的最小值
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd27a38d8cf3d77fccc7011cd3dc0628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02f266bd253738e315e84231235f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0930be8f0eabd7713ff14681fb6e35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0930be8f0eabd7713ff14681fb6e35.png)
更新时间:2021-11-19 10:08:45
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解答题-应用题
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适中
(0.65)
名校
【推荐1】某工厂为了对研发的一种产品进行合理定价,将该产品按事先拟定的价格进行试销,得到如下数据:
(1)若销量
与单价
服从线性相关关系,求该回归方程;
(2)在(1)的前提下,若该产品的成本是5元/件,问:产品该如何确定单价,可使工厂获得最大利润.
附:对于一组数据
,
,……
,
其回归直线
的斜率的最小二乘估计值为
;
本题参考数值:
.
单价![]() | 9 | 9.2 | 9.4 | 9.6 | 9.8 | 10 |
销量![]() | 100 | 94 | 93 | 90 | 85 | 78 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在(1)的前提下,若该产品的成本是5元/件,问:产品该如何确定单价,可使工厂获得最大利润.
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429f0d03e290d43a3b683c869a6e946d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b179ea1113562e401e7fa7a21a56fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827b0a9bfc6573a1e3c5dcb1446c7c95.png)
其回归直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae048beafc460d7a3175258ff59edc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b607fca993140cc420bd3fac55d6c7.png)
本题参考数值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c48e7d9a66898779b23681036c81531.png)
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【推荐2】已知函数
.
(1)若
的定义域和值域均是
,求实数a的值;
(2)求
在
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e08bd6a3cf94d05202f969f049a5cd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af908bca1b10f5de7e2d8979989c806.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d708ebfd76c13b5daf5f6659d5f6ae.png)
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解答题-问答题
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适中
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解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4184196c1f0f6626881d3eb2afb70a5c.png)
(1)若
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(2)若
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上恒成立,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4184196c1f0f6626881d3eb2afb70a5c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0020ee0942c78ab5290b4e26e34e03d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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适中
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解题方法
【推荐2】已知定义域为R的奇函数
满足
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(1)求
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(2)当m取何值时,方程
在区间(0,1)上有解?
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/f886f14c160d4eebb7b53e7aa6b21a8f.png)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/89327ea4acd04c0aa96c883f61345028.png)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/7495392570054012a3008b5b23a179da.png)
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/69cf59cce5624aeda83fcad99ae47399.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/f886f14c160d4eebb7b53e7aa6b21a8f.png)
(2)当m取何值时,方程
![](https://img.xkw.com/dksih/QBM/2015/12/3/1572340280983552/1572340286701568/STEM/5436037f327944c5a2f54c1051ce9d6c.png)
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(0.65)
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解题方法
【推荐2】已知函数
(
,
)是定义域为
的奇函数.
(1)求实数
的值;
(2)若
且
在
上的最小值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69e0c15e26f92856f65a27cd7f61f971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a98186dcca4e3093a3e910b705b087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d766939723e074c699d4fa25b66e4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb49dbba01c4ff5f686ffc8828351b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐3】已知
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(1)判断函数
的奇偶性并证明;
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是定义域内的增函数;
(3)解不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ffbfe509dbe853e31b23d2fc2d5962.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf3e3666548f5619a85969581ea2138.png)
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