解题方法
1 . 已知函数
.
(1)当
时,
恒成立,求实数
的取值范围;
(2)是否存在整数
,使得关于
的不等式
的解集为
?若存在,求出
的值;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/9808debfdd8949f8b9affc5b1e2bb88e.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/c405dd013ef146adbe2250445589afb6.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/3f171322fc1447bf8809bab5ebea8a8a.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/44cb047ab8a4404baed53c4a552f375d.png)
(2)是否存在整数
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/589d690b4a1c4b32aa1d71b18eca830e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/a0633e2141a0403cbfac295c4ca8a778.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/c9f888d0762544c0a62505aeac8d3d05.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/387f257cf7a847daa5f9c42c27783741.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146612416512/1573146618503168/STEM/fb2222668bd447b5babbc7dd8d09d1e1.png)
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2 . 已知
,二次函数
,关于
的不等式
的解集为
,其中
为非零常数,设
.
(1)求
的值;
(2)若存在一条与
轴垂直的直线和函数
的图象相切,且切点的横坐标
满足
,求实数
的取值范围;
(3)当实数
取何值时,函数
存在极值?并求出相应的极值点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54df3087bd2aad72ce146f773bd3ebb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab47b0622fe2a1abe6ad3945ef7f5b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462fa1e56b680d96af1b34fafcb59475.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8b824d37914814ccc58b7cd92a4c2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d977fb6d13ca2e62dbdc66e31e4ff5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若存在一条与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585717465ee643978c6d8435fee342f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65853e90ccb598c5648bd0cc8bef0e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bc9cd8b29883a52e27a267a0227859.png)
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3 . 已知函数
.
(1)若
,求证:
在
上为增函数;
(2)若不等式
的解集为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67135e586c87a93fc1dc6f196b83a4e6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e881fec40d166eecf66123058faf05fe.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638a1127ac6277a203e7a8c1b035d67c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c29d76a0016938b70255fd04b30ec2dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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4 . 已知函数
,函数
.
(1)若
,求不等式
的解集;
(2)若对任意
,均存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/099e273ecfe65b22d06b476a0b4f96a8.png)
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/49d054c461b34938883d7bf6d87e7a38.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/b5359071a4cf430ea187b16392b260ff.png)
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/3e335fdfa59d4f9e8530f35db845ecc5.png)
(2)若对任意
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/8b77b102528a43efbd81b6a3f5b6eaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209becbf5790eed205f0b8b9daf371cb.png)
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/fa673f8661094287ab43da2ccd973362.png)
![](https://img.xkw.com/dksih/QBM/2015/12/15/1572366134386688/1572366140080128/STEM/027bf7b5125e4441a9f943b46bb33776.png)
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11-12高三上·福建厦门·阶段练习
解题方法
5 . 已知函数
(
是自然对数的底数)
(1)求
的最小值;
(2)不等式
的解集为P, 若
且
,求实数
的取值范围;
(3)已知
,且
,是否存在等差数列
和首项为
公比大于0的等比数列
,使数列
的前
项和等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0107fb8d4cb3a9b6311fa639ca514b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8ffb5afc3de70c4fcd054c492a6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7729c3c3e86a2ee0c3f8edff8282178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c9f7fe82ce33779868c7e319a0133d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c0eda754a9ad60eadc8eb1b83d0d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74156327e5659301f391814605688899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2014·吉林长春·二模
6 . 设函数
.
(1)若不等式
的解集为
,求
的值;
(2)若存在
,使
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f26d053b9fdee276fb9a789e700234.png)
(1)若不等式
![](https://img.xkw.com/dksih/QBM/2014/4/23/1571642007306240/1571642013655040/STEM/9ce068c0d46e42188c0b1a8ac54b573d.png)
![](https://img.xkw.com/dksih/QBM/2014/4/23/1571642007306240/1571642013655040/STEM/d880312a540846f89c26266fc426ac71.png)
![](https://img.xkw.com/dksih/QBM/2014/4/23/1571642007306240/1571642013655040/STEM/1fe40fda4fd048d693abedbb34d283fd.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc71b0c5344d31009c869adfc62d0d3.png)
![](https://img.xkw.com/dksih/QBM/2014/4/23/1571642007306240/1571642013655040/STEM/ec03108e1ac545ebaa987f4bc9706176.png)
![](https://img.xkw.com/dksih/QBM/2014/4/23/1571642007306240/1571642013655040/STEM/1fe40fda4fd048d693abedbb34d283fd.png)
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真题
7 . 设函数
.
(1)求
的单调区间和极值;
(2)是否存在实数a,使得关于x的不等式
的解集为(0,+
)?若存在,求a的取值范围;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50640246dd3aeac0160d65668d80474.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)是否存在实数a,使得关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1312d640aa773779a34e9d50791ef5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229e67dd9fe978e48c221b0b9dc57f1c.png)
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2016-11-30更新
|
2164次组卷
|
7卷引用:2008年普通高等学校招生全国统一考试理科数学(辽宁卷)
2008年普通高等学校招生全国统一考试理科数学(辽宁卷)2008年普通高等学校招生考试数学(理)试题(辽宁卷)(已下线)2011~2012学年河北省衡水中学高三下学期理科数学试卷(已下线)专题3-6 导数压轴大题归类(1)-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)(已下线)第二篇 函数与导数专题3 洛必达法则 微点2 洛必达法则综合训练(已下线)第六章 导数与不等式恒成立问题 专题十一 利用洛必达法则解决不等式恒成立问题 微点3 利用洛必达法则解决不等式恒成立问题综合训练(已下线)专题14 洛必达法则的应用【练】
8 . 已知函数
,当
时,恒有
.
(1)求
的表达式及定义域;
(2)若方程
有解,求实数
的取值范围;
(3)若方程
的解集为
,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/b79709f2d62e433197d925e1c3f817d8.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/9747fa14833748bfbf3777659c1fad60.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/eca97ea1461c4e4da00a8a2f8e688ea8.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/01b1e2a8404147df8319c8018fc87941.png)
(2)若方程
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/65a972fc19d14665beee0ee03ceb6dad.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/62ac12338fe14b27980cd103b1a4dc23.png)
(3)若方程
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/f9e59a20e40a454dad79f628cf6e8c4d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/9605438f9d03409cb9960cd22c0e5462.png)
![](https://img.xkw.com/dksih/QBM/2016/1/27/1572468712128512/1572468718215168/STEM/c378338c9603470d9cb8a81528c4cc7f.png)
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解题方法
9 . 已知函数
.
(Ⅰ)若
不等式
的解集为
,
,求
的取值范围;
(Ⅱ)若
为整数,
,且函数
在
上恰有一个零点,求
的值;
(Ⅲ)在(Ⅱ)的条件下,若函数
对任意的
,有
恒成立,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282a54e8a2e03b98c0f4124b3a654a9f.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e7581a9b1bdf7e15be780aaaecc4a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e9e05a367fc2ea3b2d080187fd7235.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6c96b9335c10b51be2968e9e55d3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47acdaa7db189fa7b579edbadaf115d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)在(Ⅱ)的条件下,若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b3c645b0a9ca63c7c4ede23afcad11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3368388525e30cb7179909b03184eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365aff1e875fbea551e10b3c5981ba0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2016-12-03更新
|
1465次组卷
|
2卷引用:2014-2015学年江苏教育学院附属高中高三上学期期中理科数学试卷
12-13高二上·福建南平·期末
10 . 已知函数
在(-∞,0)上是减函数,在(0,1)上是增函数,函数
在R上有三个零点,且1是其中一个零点.
(1)求
的值;
(2)求
的取值范围;
(3)设
,且
的解集为(-∞,1),求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b0e4aefa0b2fd39706e8edb5d5a8bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e1a1611f320c0f358df77aaae3f942.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d23c80f11dcb3f7537c88cbd76a1267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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