1 . 已知函数f(x)=
x2﹣alnx(a>0).
(1)若a=2,求曲线y=f(x)在(1,f(1))处的切线方程;
(2)求函数y=f(x)在区间[1,e]上的最小值.
![](https://img.xkw.com/dksih/QBM/2016/7/8/1572897804566528/1572897810300928/STEM/3437db9ac9b6489790c08b562f558aa7.png)
(1)若a=2,求曲线y=f(x)在(1,f(1))处的切线方程;
(2)求函数y=f(x)在区间[1,e]上的最小值.
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2 . 已知曲线
的一条切线与直线
垂直,则切点的横坐标为
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490616320/STEM/b70489eed10b4cb7862b17efb81b1d8d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490616320/STEM/82c28cd7972b47b7abe26be3cc7ae71b.png)
A.4 | B.3 | C.2 | D.1 |
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3 . 若函数f(x)=x3-
x2+2x-5,则
=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905d061a2a5eeb3a6a259d92f8ba92f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b69a3ab22dd0e91ec8471b1f07d6d7c.png)
A.![]() | B.![]() | C.![]() | D.9 |
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13-14高二下·福建福州·期中
4 . 观察
,
,
,由归纳推理可得:若定义在
上的函数
满足
,记
为
的导函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b39a8a5b54b5b99e6a820e854132cd.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/b1d666f2d60443c59077ec0c363e2fad.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/6b98ad7defe44988ac13bb3befcbdd03.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/47480408fd19408992796db386ea1368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/269623576f5e476da9276dd07ec4ccc4.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/99075d2cdbef484eb104de67ea465ba4.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/ae72e60d38454291a0768babc6c2a1c9.png)
![](https://img.xkw.com/dksih/QBM/2014/9/3/1571849606389760/1571849611534336/STEM/269623576f5e476da9276dd07ec4ccc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b39a8a5b54b5b99e6a820e854132cd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知
是定义在R上的减函数,其导函数
满足
,则下列结论正确的是
![](https://img.xkw.com/dksih/QBM/2016/10/6/1573055289376768/1573055295553536/STEM/3c0c989a5ce24a2691c33bed49a93a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9747a6549da84473cae74bae57ec7d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48781856b2dd60e92baa12f9e1e17907.png)
A.当![]() ![]() ![]() ![]() |
B.当![]() ![]() ![]() ![]() |
C.对于任意![]() ![]() |
D.对于任意![]() ![]() |
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9-10高三·安徽合肥·阶段练习
6 . 函数
的定义域为开区间
,导函数
在
内的图象如图所示,
则函数
在开区间
内极值点有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5b60fb55-f0b3-4d69-b4a5-a74970d043aa.png?resizew=247)
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/b6a50a59a3a74f71afacf4d5ba892cd2.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/976dd4670bef4d6782e63db6e3664c21.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/4408e08f29de40ad83e79096a8974d3d.png?resizew=40)
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/976dd4670bef4d6782e63db6e3664c21.png?resizew=37)
则函数
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/b6a50a59a3a74f71afacf4d5ba892cd2.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2011/8/17/1570286458413056/1570286463565824/STEM/976dd4670bef4d6782e63db6e3664c21.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5b60fb55-f0b3-4d69-b4a5-a74970d043aa.png?resizew=247)
A.1个 | B.2个 |
C.3个 | D.4个 |
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2011-03-07更新
|
704次组卷
|
28卷引用:2013-2014学年山西省广灵第一中学高二下学期期末考试理科数学试卷
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7 . 设
,
,
,…,
,
,则![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013106110464/1572013111123968/STEM/51b1cb9e9f7042b6a86213c6ece52252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc250b5ffa3fecb86ed93a445b7baf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3de68727b705c5fb91cd1405cc5e1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ff91e77d6009d74869bf164a308976.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48214456de6f0991ae1553a92f1e939c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e0a78970d3a16704c80584773d8170.png)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572013106110464/1572013111123968/STEM/51b1cb9e9f7042b6a86213c6ece52252.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知函数f(x)=x2﹣ax,g(x)=lnx.
(1);令F(x)=f(x)﹣g(x),求F(x)的单调区间;
(2)设r(x)=f(x)+g(
)对任意a∈(1,2),总存在x∈[
,1]使不等式r(x)>k(1﹣a2)成立,求实数k的取值范围.
(1);令F(x)=f(x)﹣g(x),求F(x)的单调区间;
(2)设r(x)=f(x)+g(
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572546371158016/1572546377342976/STEM/2509ae95d9cb41ce9b52b7a7a29244e0.png)
![](https://img.xkw.com/dksih/QBM/2016/3/18/1572546371158016/1572546377342976/STEM/8810f2b65b3a484d9d52b3eb1b4f15bc.png)
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9 . f(x)=ax3-2x2-3,若f ′(1)=5,则a等于___________ .
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名校
10 . 已知函数
,
.
(1)求
的极值点;
(2)对任意的
,记
在
上的最小值为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecad04869b43c89cf22bcc80a92853e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26c3f8c63393f41b6365d975b6c269d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)对任意的
![](https://img.xkw.com/dksih/QBM/2014/2/24/1571522867879936/1571522873868288/STEM/a9227b3860d241cd9fffe2f2e377013d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a426b2b1114551cee091f38d0c25f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019681dfa9daeafe43d667707c124233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450d33acdc40e74927ba3c476c7e30c9.png)
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