1 . 已知函数
,若
的图象与
轴正半轴有两个不同的交点,则实数
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dac1b4d3203ef0fc060161a0613457a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-03-17更新
|
507次组卷
|
2卷引用:2016届安徽省江南十校高三下学期联考文科数学试卷
2 . 已知函数
是定义在
上的可导函数,其导函数为
,则命题
“
,且
,
”是命题
:“
,
”的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f972a7a1d05b45cffb5a291f0863c7e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/569675dd7b2aca2732324f4bea5c02e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae2c13ad91dae29cf4d9f794a8808dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2258e07b578b1b48663b5bb084da11e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10adc150ad61fe6013197e555c0d095a.png)
A.充分而不必要条件 | B.必要而不充分条件 |
C.充要条件 | D.既不充分也必要条件 |
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2017-04-11更新
|
696次组卷
|
3卷引用:2017届安徽省池州市高三4月联考数学(理)试卷
名校
3 . 已知函数f(x)=
x3+
mx2+
x的两个极值点分别为x1,x2,且0<x1<1<x2,点P(m,n)表示的平面区域内存在点(x0,y0)满足y0=loga(x0+4),则实数a的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb84f6fbac102ccf326b2223d69cb7cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e09d526d8d1662c1f02048f4b84194ad.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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2019-04-20更新
|
111次组卷
|
2卷引用:【全国百强校】安徽省蚌埠第二中学2018-2019学年高二下学期第一次月考数学(理)试题
4 . 已知函数
,则函数
(
为自然对数的底数)的零点个数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f784945dc3a390349b4b1349f59f30b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eafce82384b40b6e7e14bb051d49dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
A.3 | B.4 | C.6 | D.8 |
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5 . 已知函数
,若存在正数
,使得
,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6124a23538252a827c9bb8ce62910eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6700237e42df2f85392e4244ba0302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
6 . 已知函数
在
的一个零点为
,则
,下列不等式恒成立的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdcd5708d98789edd544d7ae3e13684b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8172d4bb6642e6e8d76a1799744551e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1143034fb0c6e19c9d062946e9fac02.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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13-14高三上·山东临沂·阶段练习
名校
7 . 已知函数
下列结论中①
②函数
的图象是中心对称图形 ③若
是
的极小值点,则
在区间
单调递减 ④若
是
的极值点,则
. 正确的个数有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b3b21ff935411cd4deed7c872fc006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68bf6cf3eef0d7678f9613a5cfc7dc69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c962a7d0fbfe97ebfe377242f63eac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad73a0e440d4867112c9e15b74b0769d.png)
A.1 | B.2 | C.3 | D.4 |
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2014·四川绵阳·一模
8 .
是定义在非零实数集上的函数,
为其导函数,且
时,
,记
,则
![](https://img.xkw.com/dksih/QBM/2014/11/14/1571894981091328/1571894986481664/STEM/a9fa6928ef474079bcfee31d1c7da291.png)
![](https://img.xkw.com/dksih/QBM/2014/11/14/1571894981091328/1571894986481664/STEM/1e54bc6f5080471bbbfd2ac40e508787.png)
![](https://img.xkw.com/dksih/QBM/2014/11/14/1571894981091328/1571894986481664/STEM/46f8feafab5e46ad90f29433ad75b1c0.png)
![](https://img.xkw.com/dksih/QBM/2014/11/14/1571894981091328/1571894986481664/STEM/49a6d42de8804728bc4641bc1875b8f3.png)
![](https://img.xkw.com/dksih/QBM/2014/11/14/1571894981091328/1571894986481664/STEM/f50ac422a2ea42a4bbb8283556be37d8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
名校
9 . 已知函数
在
上可导,其导函数为
,若
满足:
,
,则下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca75dc9847260a900238723631b138b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cfff9a7b643ead9d8fa57ab9918e2e5.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
10 . 设
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfcbc70086f8f19b314e449030c207de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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