名校
1 . 已知函数
.
(1)讨论
的单调性;
(2)设
,若对任意
,均存在
,使得
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dbefa7dec39777dfa8f3d655862674.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55bc911b7bc356ec58ca85a4501a1b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e300e60be8d1827744cdc01e7d04c840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a49684ba67f71171321586f1a77ad4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3b1f02a33e3370d59d60cf58682a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2018-05-02更新
|
1005次组卷
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4卷引用:内蒙古包头市第六中学2020-2021学年高二下学期期中考试数学(理)试题
名校
解题方法
2 . 函数
的递减区间为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3677029bed1287f75465c4339615c66c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-01-27更新
|
165次组卷
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4卷引用:内蒙古赤峰二中2020-2021学年高二上学期期末考试数学(理)试题
解题方法
3 . 已知
,
两个输油站之间是120公里的沙漠地带.现需要在
,
两输油站间修建一条大型输油管道通过该沙漠地带,某工程队承接此项工程,需要铺设输油管道且在
,
之间等距离修建增压站(又称泵站).经预算,修建一个增压站的工程费用为400万元,铺设距离为
公里的相邻两增压站之间的输油管道费用为
万元.设此项工程的总费用为
万元.
(1)试将
表示成关于
的函数;
(2)当
时,讨论该函数的单调性;
(3)求出需要修建多少个增压站才能使总费用
最小,并求出最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749d0e03dc286f2a835768d4ac5f07a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998a9c302af143f34abaa2cd0273fc00.png)
(3)求出需要修建多少个增压站才能使总费用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0d46da745fa5e71ea97e7b30beb6fb.png)
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名校
解题方法
4 . 设函数
.
(1)求
的单调区间;
(2)求函数
在区间
上的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8dceb59cd4e709b211ff4dbc3142dc7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68072473a5106f93e3026d992859f7a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b448fe164c2c2931805e3b3847dcdd75.png)
您最近一年使用:0次
2020-10-17更新
|
195次组卷
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3卷引用:内蒙古包头市第四中学2020-2021学年高二下学期4月月考数学(理)试题
名校
5 . 设函数
,
(1)求
的单调区间;
(2)当
时,求函数的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a36f429955183b0e754cd8ca75109df.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572446492557312/1572446498496512/STEM/7493205b4de64603ac9a1abff0b787a3.png)
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2016-12-04更新
|
502次组卷
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5卷引用:内蒙古杭锦后旗奋斗中学2020-2021学年高二下学期测试(二)数学(文)试题
名校
6 . 已知函数
[1,
.
(1)若
,求
的最大值;
(2)讨论y=f(x)零点的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e14eb7699b0c89ab93317138beba9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228a43c45591fc6bfd9720da69a0fac1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0974bc221468c64f564d52d08c8c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)讨论y=f(x)零点的个数.
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