真题
解题方法
1 . 已知函数
在
上满足
,当
时
取得极值
.
(1)求
的单调区间和极大值;
(2)证明:对任意
、
,不等式
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840903c8cb59e0302d7249cb1fa4b615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca9a617f33b747c5f0d76f8f3db071a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3502f1cd0038eb888dc121026c6820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ceaeebe50a5f78b52da0850741cee42.png)
您最近一年使用:0次
2020-06-23更新
|
405次组卷
|
4卷引用:2011年辽宁省瓦房店市五校高二上学期竞赛数学文卷
2 . 已知函数
.
(1)试判断函数
的单调性;
(2)若函数
在
上有且仅有一个零点,
①求证:此零点是
的极值点;
②求证:
.
(本题可能会用到的数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
(1)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066545d533a4f683794e311d3ccf4f0a.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38bd8d7a840f2d96f45406c9fb843dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
①求证:此零点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf3a0e4fd597d2bb0c25070aa45f049.png)
(本题可能会用到的数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2acf9e90fc3581e8698100d30706c3e6.png)
您最近一年使用:0次
3 . 已知函数
.
(I)试判断函数
的单调性;
(Ⅱ)若函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400480e332e8eaf6ddc7cb1d413c3bed.png)
在
上有且仅有一个零点,
(i)求证:此零点是
的极值点;
(ⅱ)求证:
.
(本题可能会用到的数据:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c4817ccb65d265cee8d06c70eac4d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10edca5c73db8439aec3b442eb22a1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7be8af850e9e612feefd2a50d86af2f.png)
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
(I)试判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c70ee19e659f32d780fc68d4200c081b.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400480e332e8eaf6ddc7cb1d413c3bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8938db94f49dcbe0c383fba0241bb0da.png)
(i)求证:此零点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
(ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9f263902128230501017bb0598a6ae.png)
(本题可能会用到的数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c4817ccb65d265cee8d06c70eac4d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10edca5c73db8439aec3b442eb22a1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7be8af850e9e612feefd2a50d86af2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50101047632b94dcd5cf8035b093cc5.png)
您最近一年使用:0次
名校
4 . 已知函数
,
.
(1)若
,求证:当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cc24a241f295237bdb2fce02771bd2.png)
(2)若不等式
恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597adeb88b25d5b0a57852e5c72d83fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d07f9b89b24792b5e5cc639b399ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cc24a241f295237bdb2fce02771bd2.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50414045ed12fe4da0b6a214a610be75.png)
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2019-10-23更新
|
793次组卷
|
5卷引用:辽宁师范大学附属中学2019-2020学年高二下学期期中考试数学试题
解题方法
5 . 已知函数
其中
,
为自然对数的底数.
(1)当
时,证明:对
,
;
(2)若函数
在
上存在两个不同的零点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49c8181dccce12d19e8310973fb0438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.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/e7364911f4597bfe996da15bf929c7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94cc25a7cf28ed096549fbae97fce40a.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aae9c8988f4a48db69cad3308942c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-03-24更新
|
348次组卷
|
2卷引用:辽宁省大连市第八中学等重点学校协作体2018-2019学年高三4月模拟数学(理)试题
名校
6 . 已知函数
.
(1)证明
在区间
内有且仅有唯一实根;
(2)记
在区间
内的实根为
,函数
,若方程
在区间
有两不等实根
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d961e1bd917708304d05112416e009.png)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3eaf48d660476bbe3acd896e3c83654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03cc22311e4c24b67b79a7bc6be55894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a7a4a037a4dfe973f1eb683d93d799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aed08076f1a35972d3e406d163f4226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88a33a0e8171db6fc10210e8a9ee3f0.png)
您最近一年使用:0次
7 . 已知
是函数
的极值点.
(Ⅰ)求实数
的值;
(Ⅱ)求证:函数
存在唯一的极小值点
,且
.
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43acb2f9d49d4c7f7ec9bf586c4ce410.png)
(Ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅱ)求证:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97746a44f4a50a7fa244b58a9b2e5885.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9405361d7be3c9e4d462a4e955d8fe3c.png)
您最近一年使用:0次
2019-05-13更新
|
1092次组卷
|
4卷引用:【市级联考】辽宁省大连市2019届高三第二次模拟考试数学(文)试题
8 . 已知函数f(x)=lnx+ax2-x(x>0,a∈R).
(Ⅰ)讨论函数f(x)的单调性;
(Ⅱ)求证:当a≤0时,曲线y=f(x)上任意一点处的切线与该曲线只有一个公共点.
(Ⅰ)讨论函数f(x)的单调性;
(Ⅱ)求证:当a≤0时,曲线y=f(x)上任意一点处的切线与该曲线只有一个公共点.
您最近一年使用:0次
2019-04-01更新
|
754次组卷
|
6卷引用:【市级联考】辽宁省大连市2019届高三下学期第一次(3月)双基测试数学(文)试题
名校
9 . 已知函数
其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f150d907bae9406ac3920de3be6ded.png)
(Ⅰ)若
,且当
时,
总成立,求实数m的取值范围;
(Ⅱ)若
,
存在两个极值点
,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6885a7978eb03346e2bd26e655dcb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f150d907bae9406ac3920de3be6ded.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4b3520e95587f35273e8c78886ae745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c4bbbe3df69cc4571bee158f421e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dd5362c87a2a88033067f73ae8ebbd.png)
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2019-04-03更新
|
928次组卷
|
3卷引用:2019届辽宁省大连市第八中学高三5月仿真模拟数学(理)试题
真题
10 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3279953d500d29f6ee61861c747b047.png)
(I) 如
,求
的单调区间;
(II) 若
在
单调增加,在
单调减少,证明
>6.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3279953d500d29f6ee61861c747b047.png)
(I) 如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9016d5eea6528eee0549ed213d1e6e0b.png)
![](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/797ff460d6451d06496ff89721123e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c355690051f6f5d671962b5ce2cc1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628560d39eeb0339fa00c9c15ab2c095.png)
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2019-01-30更新
|
1565次组卷
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9卷引用:2010年大连市第三十六中学高三高考压轴考试理科数学卷
(已下线)2010年大连市第三十六中学高三高考压轴考试理科数学卷2009年普通高等学校招生全国统一考试理科数学(宁夏卷)(已下线)2011届陕西省师大附中、西工大附中高三第七次联考理数(已下线)2012届内蒙古包头三十三中高三上学期期中考试理科数学(已下线)2012届海南省洋浦中学高三年级第2次月考测试理科数学试卷(已下线)第28讲 零点差问题-突破2022年新高考数学导数压轴解答题精选精练(已下线)第13讲 双变量问题-2022年新高考数学二轮专题突破精练(已下线)专题09 函数零点问题的综合应用-1(已下线)重难点突破09 函数零点问题的综合应用(八大题型)