名校
1 . 定义在
上的奇函数
满足
,且当
时,不等式
恒成立,则函数
的零点的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee64d91962737f227ea7526db98bcf61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6903b78a833d4e542dbfe95188479b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5be3af0c67a20bee47063487d305f2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-06-05更新
|
736次组卷
|
2卷引用:黑龙江省大庆中学2016-2017学年高二下学期期末考试数学(文)试题
名校
2 . 已知函数
,
,
,实数
是函数
的一个零点,给出下列四个判断:
①
; ②
; ③
; ④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecebb31ea8ee6db240b42a5ee2c5e88.png)
其中可能成立的序号是__________ .(把你认为正确的命题的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f701c11c31bee369ceab4f6508e35ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04fe966866f7ad311adedd93cf25c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5e93a719c729b3408e15f31e60bd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ac2fd2ce7c3667538b8a728f844372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/359bcdcac0727d5355d36983a9d38aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7766467b96ead6b0554be7c3633c7796.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ecebb31ea8ee6db240b42a5ee2c5e88.png)
其中可能成立的序号是
您最近一年使用:0次
2017-05-09更新
|
474次组卷
|
2卷引用:山东省莒南县第三中学2016-2017学年高二下学期期中考试数学(文)试题
3 . 已知函数
.
(1)求
的单调区间;
(2)若
,求证:函数
只有一个零点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fc33cc11358a7671afd8ee851280fc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4f1758fd4f661d451b4c32a88af46.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/6a71bb8a80c75bcc1480263bc7ea3479.png)
您最近一年使用:0次
2016-12-04更新
|
321次组卷
|
2卷引用:山西大学附属中学2018-2019学年高二下学期3月模块诊断数学(理)试题
解题方法
4 . 设函数fn(x)=xn+bx+c(n∈N+,b,c∈R).
(1)设n≥2,b=1,c=-1,证明:fn(x)在区间
内存在唯一零点;
(2)设n=2,若对任意x1,x2∈[-1,1],有|f2(x1)-f2(x2)|≤4,求b的取值范围;
(3)在(1)的条件下,设xn是fn(x)在
内的零点,判断数列x2,x3,…,xn,…的增减性.
(1)设n≥2,b=1,c=-1,证明:fn(x)在区间
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425401917440/1572425408233472/STEM/0d54d686a138494e90d6df6b21954c1b.png)
(2)设n=2,若对任意x1,x2∈[-1,1],有|f2(x1)-f2(x2)|≤4,求b的取值范围;
(3)在(1)的条件下,设xn是fn(x)在
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425401917440/1572425408233472/STEM/0d54d686a138494e90d6df6b21954c1b.png)
您最近一年使用:0次
12-13高二上·福建泉州·期末
解题方法
5 . .已知函数
的极大值点为
.
(1)用实数a来表示实数b,并求a的取值范围;
(2)当
时,
的最小值为
,求a的值;
(3)设
,
两点的连线斜率为k.求证:必存在
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a6fa02d56e7338c83cf1ae518e3ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
(1)用实数a来表示实数b,并求a的取值范围;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6070f2ee5e48cce77eb4a2cb9f11ccfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459c84c9addfbd1cdd0a877ba7c584e4.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f5e21076f4f188625d0f69e765c958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be5b102c66290911df81f1d1c6badf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3ae261408e4c31ae4f1bc70351793a.png)
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