已知函数
.
(1)讨论函数
的单调性;
(2)设
,当
时,对任意
,存在
,使
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01e42b19fca8c891f899de22ad764eb.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e753a9935c9ca0bfa846619bb92d8b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365a6b17e276336e029b84bbdab17eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a99f5dd1bba94c164fb01e0df7c86e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207bf290c6d6791f1223122f2105b205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13fe60fb6dd9dde4d9a091393d49917.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
2018·福建三明·一模 查看更多[4]
【全国百强校】福建省三明市第一中学2018届高三下学期适应性练习(一)数学(理)试题2019届湖南省百所重点名校大联考高三高考冲刺数学(理)试题2019届湖南省百所重点名校大联考高三高考冲刺数学(文)试题(已下线)第七章 导数与不等式能成立(有解)问题 专题四 双变量能成立(有解)问题的解法 微点4 双变量能成立(有解)问题的解法综合训练
更新时间:2018-06-24 08:56:41
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解答题-问答题
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困难
(0.15)
【推荐1】已知函数
.
(1)讨论函数
的单调性;
(2)若
在
恒成立,求整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88067d4275657f7ea729d1a17535a546.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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困难
(0.15)
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)若对任意的
,都有
成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52513511cb7c29225ec566cd7d54dcd3.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a069e7ebd03a4dd5e252cf680f4945a9.png)
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困难
(0.15)
【推荐1】已知函数
,
,记
.
(1)若
,且
在
上恒成立,求实数
的取值范围;
(2)若
,且
存在单调递减区间,求
的取值范围;
(3)若
,设函数
的图象
与函数
图象
交于点
,过线段
的中点作
轴的垂线分别交
,
于点
,请判断
在点
处的切线与
在点
处的切线能否平行,并说明你的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6263576e5c3f2324a8dac311476bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07f0f5049b381523ce7a13f3067381c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ad8c947e7b6d61c611bb1b9df7eecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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困难
(0.15)
【推荐2】设
.
(1)若直线
与和
和
图象均相切,求直线
的方程;
(2)是否存在
使得
按某种顺序组成等差数列?若存在,这样的
有几个?若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550e9fd0afb51923f72b65ce72bbe419.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbb0751d3fe0d2a6cc024a62e9f7825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d34ea801c04c749794ee2e15c3110c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】已知函数
,
.
(1)讨论
的单调性;
(2)设函数
,若
有两个零点
.
(i)求
的取值范围;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364c5ffcd655034ead54efed24874e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff97d054e39447e1ccc2e351fb28775.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f706b63aa45669c057b3828ca158bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3da00fe1feafb42d7e2254dd5f8589.png)
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解题方法
【推荐2】已知函数
,在定义域上有两个极值点
.
(1)求实数a的取值范围;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27ecfc399b7fef5f3ed386d53f634a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3400359427f6a1047f599cf113ed577.png)
(1)求实数a的取值范围;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fb3b875f75ae7fe6929b762fbe9459.png)
您最近一年使用:0次