已知函数
,
.
(1)证明:函数
的极小值点为1;
(2)若函数
在
有两个零点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ea7513fa0f27d8dd42459c1526b90e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc0e93edfac7cd3ed0862fe5b617ee07.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df49341b57eb107f416a014903ce25a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f7464e7559a63bba3915987982fa9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329b3bdd884cff6417ecd913ea00fe67.png)
2019·福建泉州·二模 查看更多[4]
【市级联考】福建省泉州市2019届普通高中毕业班第二次质量检查文科数学试题2019届黑龙江省哈尔滨市第六中学高三第四次模拟考试数学(理)试题(已下线)专题04 函数的零点(第六篇)-备战2020年高考数学大题精做之解答题题型全覆盖(已下线)模型2 用设而不求法速解函数零点问题模型(高中数学模型大归纳)
更新时间:2019-05-07 14:38:11
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【推荐1】已知函数
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(1)证明:当
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(2)若关于
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【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
满足
,对于任意
R都有
,且
,令
.
(1)求函数
的表达式;
(2)求函数
的单调区间;
(3)研究函数
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5bb89c3ad435f1ef59307b174105ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e44c45ef0334070fc149b452dee26ae5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8559250e7a91f36fe7a8ec6ce6a1550f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cd058ecddd80deb7cc3f060cd0f064.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)研究函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
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【推荐1】设函数
,其图象与x轴交于A(x1,0),B(x2,0)两点,且x1<x2.
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(2)证明:f′(
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68259d8867832b8141336e24e66dbcf4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:f′(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e741fbe5a3e572cbffd7733bc7cf68.png)
(3)设点C在函数y=f(x)的图象上,且△ABC为等腰直角三角形,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4a22ac415f7f632afe2bc852ca468e6.png)
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【推荐2】已知关于
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1886064c15e080c23b19ae99921b8ff8.png)
(1)当
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572262428254208/1572262433906688/STEM/bae5d7cf30e349a687fe929551f27619.png)
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(2)若函数
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572262428254208/1572262433906688/STEM/e25b7b4259df44cd95b3ab1c82e7d42d.png)
![](https://img.xkw.com/dksih/QBM/2015/10/20/1572262428254208/1572262433906688/STEM/6589ebd6a3d54572b87facd467aa1593.png)
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【推荐3】已知函数
.
(1)当
时,讨论函数
的极值;
(2)若存在
,使得
,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef53f8cdfc5e99b4cb8638a83c1bfd86.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15815a75fb1503218ca45d2e9ce303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若存在
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【推荐1】已知函数
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(Ⅰ)当
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(Ⅱ)设
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,
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(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/616d615881fea181c6bf6cdd614690a6.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e494fd11bcc9b83a48ecbc0513c7f81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3661dbd3b2c578c685e6a11a4102ddd.png)
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【推荐2】已知函数
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(1)若
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(2)当
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【推荐3】已知函数
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(Ⅰ)若关于x的不等式
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证明函数
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(Ⅲ)若
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(Ⅰ)若关于x的不等式
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(Ⅱ)若
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(Ⅲ)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3bbe1e1edab5afae00884812c0dbe4.png)
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