1 . 给出定义:若函数
在
上可导,即
存在,且导函数
在
上也可导,则称
在
上存在二阶导函数,记
若
在
上恒成立,则函数
在
上为凸函数.以下四个函数在
上是凸函数的是
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4634d0714ad90046e2ec7f2305c4d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683d7c81a47aeaae60c0dde61164ab7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55e7e797174ed5458a2602cb5fcc0f60.png)
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113610877018112/3113956063387648/STEM/ac1bdb86c89c41a6a161d1a561cdea48.png?resizew=4)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
2 . 求极限:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2d5de0e823fb837c415756173e1855.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2d5de0e823fb837c415756173e1855.png)
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3 . 已知数列
是无穷等比数列,其前n项和是
,若
,
,则
的值为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3939cb6a7baabdf0060ea4533ae7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752cf42c1043745a337b6c0394709c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
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4 . 下列函数中,当
时,使得
恒成立的函数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/636a8d9e362e768e825a98afdea2bd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c90df237826bbc15f3e08061cefdde.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 已知函数
在
处的导数为2,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b23ecddfea0d176f3497f41e791cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b23ecddfea0d176f3497f41e791cad.png)
A.2 | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2020-03-25更新
|
856次组卷
|
3卷引用:陕西省渭南市临渭区2019-2020学年高二上学期期末数学(文)试题
6 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbbb042fed04b6edf25b69e6248b4ba.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbbb042fed04b6edf25b69e6248b4ba.png)
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7 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a6164c4ff882fd5c3f41f80cda225.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673a6164c4ff882fd5c3f41f80cda225.png)
您最近一年使用:0次
8 . 计算![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6021c4022befc0932b3c81100bd45cf7.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6021c4022befc0932b3c81100bd45cf7.png)
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名校
9 . 若
存在,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d097774d7149a712cb3022830a901409.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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10 . 计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b24093bbaf7b7e4176cde9cfa4a9542.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b24093bbaf7b7e4176cde9cfa4a9542.png)
您最近一年使用:0次