名校
1 . 已知函数
.
(1)当
时,讨论
极值点的个数;
(2)若a,b分别为
的最大零点和最小零点,当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4bda5d60f70b82b589d5cda6480e94.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc329b32ecf0f0532d09a8a21343e8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若a,b分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5919e5f8ff23af698db3619d142c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9589f30699d1a766f1e700cc88a344.png)
您最近一年使用:0次
2020-02-25更新
|
452次组卷
|
3卷引用:重庆市第一中学校2018-2019学年高二上学期期末(理)数学试题
2 . 已知函数
,
.
(Ⅰ)求
的单调性;
(Ⅱ)若
在
上存在两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88349907f0dd354f7083d172f44f3da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知函数
.
(1)若
,求函数
在
处的切线方程;
(2)令
,讨论函数
的单调性;
(3)当
时,
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac04e03f168f65b42da7d8daaba03f2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b71b0c86aefb7f7f1f2c87e180504c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
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4 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f8faf6ec42a6ddfee489252a10fcc7.png)
(1)若函数
在
上单调递增,求实数
的取值范围;
(2)设函数
,证明:
是函数
有两个零点的充分条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9798c9975860fa9ca90d9fbb31c40ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f8faf6ec42a6ddfee489252a10fcc7.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0534ca9439a3f8c5ef22c7fa66e7c69d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c388166862b3ccfcc7ca749ebe5949.png)
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5 . 已知函数
.
(Ⅰ)当
时,求曲线
在点
处的切线方程;
(Ⅱ)若
存在两个极值点
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/059e73f7d1a5438a8a05fac1e8a15ff7.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f5db06d5a4c6dba391448c804ea4a48.png)
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解题方法
6 . 已知函数
,其中
为常数且
.
(Ⅰ)若
是函数
的极值点,求
的值;
(Ⅱ)若函数
有3个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ef2ff0f557794cd69fea7c53e7ea3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
7 . 已知函数
(
,e为自然对数的底数).
(1)若
,求
的最大值;
(2)若
在R上单调递减,
①求a的取值范围;
②当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edc02eba0b3fef2562d4451925ba612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a20457d180264f78d611dc7893d735.png)
①求a的取值范围;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4cf16e39bff4aa2d482c90411d5ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b67eedd9dedf395de32943f2d1b24e.png)
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名校
8 . 已知函数
.
(1)设
,(其中
是
的导数),求
的最小值;
(2)设
,若
有零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb7cc7039a5b2afea23e53ecc659a06.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c76ce20708584145b674c4b1f59951.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/a813b5adbf5c7082561237894ba6d599.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8441d4a1615f9e62b7991d6c1f095ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-02-09更新
|
877次组卷
|
2卷引用:2020届重庆市第一中学高三上学期期末考试数学(理)试题
名校
9 . 已知点A是椭圆
的上顶点,斜率为
的直线交椭圆E于A、M两点,点N在椭圆E上,且
;
(1)当
时,求
的面积;
(2)当
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68bc8aef11e1b71e72f5ae1e85152a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893d4e8d70ea2c716ac7b6c1777a77f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3342ceb71dc21a5e6150caad2ce0b029.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386f8a9bce093666ce2694a22e10bb47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a9fc2dda89829fa2c610a8fce86d22.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aa30afe4e58bec4fe45cd82b7e0b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5fb376c61851d477bafcf6d6563597.png)
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名校
10 . 已知函数
,
,
是
的导函数.
(1)讨论函数
的极值点个数;
(2)若
,
,若存在
,使得
,试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f1441c3e9edd48edbe7574eb8771e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d41acc47493556617fe7b9e55093d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60978743068411d86c577d4406cc1a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450398974b1561ca801e102e16df6789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77397fbf8224ec0ae05cdf385839f70c.png)
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