1 . 已知函数
,
.
(1)当
时,
①求函数
在点
处的切线方程;
②比较
与
的大小;
(2)当
时,若对
时,
,且
有唯一零点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4487166972b905fb2c0dfc94a2ac636c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599c96746eee25c9b523b65696885687.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
①求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f84134092f31767ff9f7e8200a79fa.png)
②比较
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d20fd487c74eec4c5bdc1a830da427d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160c086005ce88fba362bd9242e7e865.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0e7e0b498ba4672a6dc1ba6da06f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca0d0d4d8c6a1e5d90264828345a5705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef5cc7859624574f1ef7e4892669b67.png)
您最近一年使用:0次
2019-12-14更新
|
580次组卷
|
3卷引用:江苏省南通市通州区2019-2020学年高三第二次调研抽测数学试题
名校
解题方法
2 . 已知函数
,
.(
为自然对数的底数)
(1)设
;
①若函数
在
处的切线过点
,求
的值;
②当
时,若函数
在
上没有零点,求
的取值范围.
(2)设函数
,且
,求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d70266454df40256268b19b055a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8d28c711e4c5b2dd75047801ed2d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
①若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd09fb9482124fd35f19b86894648f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f00bba28ce932fbcc82ed562994f031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f669dcf6b9da65aab4c1afafb68b8dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52ed14f9b002ee44c19c1c674fbad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee863b185ed0bc1dddccd153e8f1f8e.png)
您最近一年使用:0次
2018-03-07更新
|
704次组卷
|
14卷引用:2015届江苏省南京市、盐城市高三第一次模拟考试理科数学试卷
2015届江苏省南京市、盐城市高三第一次模拟考试理科数学试卷2015届江苏省南京市、盐城市高三第一次模拟考试文科数学试卷(已下线)《2018届优等生百日闯关系列》【江苏版】专题二 第三关 以函数零点为背景的解答题2016届湖南省东部株洲二中六校高三12月联考理科数学卷2017届河北武邑中学高三上调考三数学(理)试卷2017届河北武邑中学高三上调考三数学(文)试卷2017届河南息县一高中高三上月考一数学(理)试卷广东省珠海市珠海二中、斗门一中2018届高三上学期期中联考数学(理)试题江西省赣州市寻乌中学2018届高三上学期期末考试数学(理)试题云南省昆明市第一中学2018届高三第六次月考数学(理)试题【区级联考】天津市和平区2018-2019学年度第二学期高三年级第三次质量调查数学(文)试题【区级联考】天津市和平区2019届高三年级第三次质量调查数学(理)试题2019届天津市和平区高三高考三模数学(文)试题天津市和平区2019届高三下学期第三次质量调查理科数学试题
解题方法
3 . 已知函数
,其中
是自然对数的底数.
(1)当
时,求曲线
在
处的切线方程;
(2)如果对任意
,不等式
恒成立,求实数
的取值范围;
(3)讨论函数
的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f88f469ea1c3f5af9ee49300402769b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)如果对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f732b4f51144a5f2c213f46f27e832c7.png)
您最近一年使用:0次
4 . 设函数
,函数
为
的导函数.
(1)若
,都有
成立(其中
),求
的值;
(2)证明:当
时,
;
(3)设当
时,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fab43bc1f433c1adabbdc0cd891e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4b04824a308519a61318a82aa97a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4484f25590f28ddb69c9c548d83063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26927f1f0be044942dfce30c3607158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/464d1a22cc8c028f88203359018ed005.png)
(3)设当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8371be9ca192432adc4dade987ee4a6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
5 . 已知函数
.
(1)若
,求曲线
在点
处的切线方程;
(2)若
,求函数
的单调区间;
(3)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2a36d3bc6c6c407ee331c83a490cc3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002ad1638f25e355d70d5ab63e637f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf9befc3b336d83b83bcfcbc19c0752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12e02125e0a1f3cda39742b765baa74c.png)
您最近一年使用:0次
2018-04-29更新
|
689次组卷
|
6卷引用:江苏省扬州大学附中2021届高三下学期2月检测数学试题
18-19高二下·江苏南通·期中
解题方法
6 . 已知函数
,
.
(1)
时,求
在
处的切线方程;
(2)对于任意
,
恒成立,求实数
的取值范围;
(3)设函数
的两个零点为
,
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8782ba2681c1453d5997882ab63bf051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfe44972e8bf50ec9d250f298bbee0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f29e87b084eb7d92a6544fe3132e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)设函数
![](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/f85d07bae5250632c0e02ec976b2426d.png)
您最近一年使用:0次
7 . 已知函数
,
在
处取极大值,在
处取极小值.
(1)若
,求函数
的单调区间和零点个数;
(2)在方程
的解中,较大的一个记为
;在方程
的解中,较小的一个记为
,证明:
为定值;
(3)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5b9786691166ee37475c593fba6636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a4eecd249473a831d0ee472470240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9565876bc50bceb63e5793c8c67a9032.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1487e9e4bd2c25c594e655e95c44d574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb788ae88e457017bb81120b6a2e5ee.png)
(2)在方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46db6ccb3adc70100e1c581f606157c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec13d0c7a2f811a742d7e89960c5fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30c926f1a866b6c67b44f14e6018359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361b11b445f4801ef928a198c8b46273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75c42450d4c9cb1a19e34f03a4bc18a.png)
(3)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1403d67bf7315f6869255bbac7060f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2d9a8239618fd3d2d026ae639a2a80.png)
您最近一年使用:0次
名校
8 . 函数
,以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d38fc95a2ff3682f2ebc8576b73eeb2.png)
A.函数的减区间为![]() | B.过点![]() ![]() |
C.函数的最小值为![]() | D.![]() ![]() |
您最近一年使用:0次
9 . 已知函数 f(x) =
-ax(a > 0).
(1) 当 a = 1 时,求证:对于任意 x > 0,都有 f(x) > 0 成立;
(2) 若函数 y = f(x) 恰好在 x = x1 和 x = x2 两处取得极值,求证:
< ln a.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fdd4f2693028f8d3af6fe8beed4851.png)
(1) 当 a = 1 时,求证:对于任意 x > 0,都有 f(x) > 0 成立;
(2) 若函数 y = f(x) 恰好在 x = x1 和 x = x2 两处取得极值,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f890c615c5af6329afbcbcb0c70b7592.png)
您最近一年使用:0次
解题方法
10 . 已知函数
.
(1)求
的最值;
(2)若函数
有两个零点
.
①求a的取值范围.
②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2245d16d76d00751aa025d231ded81ac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
①求a的取值范围.
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ebccc85b28ef06b86e0e93f0ffdcfcc.png)
您最近一年使用:0次
2021-03-30更新
|
225次组卷
|
2卷引用:江苏省镇江市句容碧桂园学校2022~2023学年高三上学期9月月考数学试题