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解题方法
1 . 已知函数f(x)=ex﹣1+alnx.(e为自然对数的底数),λ=min{a+2,5}.(min{a,b}表示a,b中较小的数.)
(1)当a=0时,设g(x)=f(x)﹣x,求函数g(x)在[
,
]上的最值;
(2)当x
1时,证明:f(x)+x2
λ(x﹣1)+2.
(1)当a=0时,设g(x)=f(x)﹣x,求函数g(x)在[
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(2)当x
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e119c508fd265e3e3d78749e54fe4f43.png)
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2 . 已知函数
.
(1)若
,求证:
在区间
是增函数;
(2)设
,若对任意的
,恒有
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0145c6588620a7301f14698c8837a93e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52767cb407873a34008a70a6f5111266.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6e28dbfcdd6fb66b9ff759be044287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09408ffff3b1e7a0fafbc8fafd229b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9157ac76812effa31cff2d83bd300f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2019-12-16更新
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372次组卷
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2卷引用:重庆市合川实验中学2021届高三上学期期中数学(理)试题
3 . 已知
,函数
,
.
(1)求
在区间
的最大值
;
(2)若关于
不等式
在
恒成立,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b0494faba40f2a5e7e1879b4198231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a07711b73ed25c334e5eb2eccb52456.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad25134fe5a0d7f1df703ce04477e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7ef169f00be74020ff6c7c740bf734.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a239d924a26dbc7f33052c63a20a327a.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc2d45cb4b93d41e49c20672e3483c.png)
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4 . 已知函数f(x)=ln(x+1)+
(a∈R).
(1)当a=1时,求函数f(x)在点(0,f(0))处的切线方程;
(2)讨论函数f(x)的极值;
(3)求证:ln(n+1)>
(n∈N*).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3855cad162ed7bdf5b8293e9d8844ae.png)
(1)当a=1时,求函数f(x)在点(0,f(0))处的切线方程;
(2)讨论函数f(x)的极值;
(3)求证:ln(n+1)>
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8daf382c942f0e64ac03c1d13cdd9d.png)
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2019-04-16更新
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557次组卷
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2卷引用:重庆市天星桥中学2020-2021学年高二下学期期中数学试题
11-12高二下·江西抚州·期中
解题方法
5 . 已知
.
(1)求函数
在
上的最小值;
(2)对一切
恒成立,求实数
的取值范围;
(3)证明:对一切
,都有
成立.
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/b2298f781ef14a6b81206b903f4ef66b.png)
(1)求函数
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/0562df9f22894fde839b6b1f939bdb24.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/6a3310f2c84f44f5b50743d2e691383d.png)
(2)对一切
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/ce4fb0f780474709ba7522636d7cff2e.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/1d9d6b20e11b4c75a0b1e2553d919338.png)
(3)证明:对一切
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/015629bd37164ef9bca33b26616c34cc.png)
![](https://img.xkw.com/dksih/QBM/2013/4/25/1571197127122944/1571197132873728/STEM/8c9bffeed2f147c585867635a1689279.png)
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6 . 已知函数
.
求
的单调区间;
Ⅱ
证明:
其中e是自然对数的底数,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4112bc7b35101c74442bdecdec580c5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e86c3d9a86ec4798af6a52af6057ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0311e8fea14a1cbe2c89b30a9cfbc62.png)
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2018-12-10更新
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2卷引用:【全国百强校】重庆市重庆第一中学2019届高三(上)期中数学试卷(文科)
名校
7 . 已知函数
.
(1)求
的单调区间;
(2)若
,证明:
(其中
是自然对数的底数,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da1cf990b217e4673bb294989b1aec7.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fe2115d883d13561e28006d3f6143b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb788e9c92435bf2484a947180d5815d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d218992d1942266d7208e476d0c4100.png)
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2018-11-30更新
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530次组卷
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3卷引用:【全国百强校】重庆市第一中学2019届高三上学期期中考试数学(理)试题
2018高三上·全国·专题练习
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8 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3348778fd42e9d895afdbc088c7044e8.png)
.
(1)若函数
在
上是增函数,求正数
的取值范围;
(2)当
时,设函数
的图象与x轴的交点为
,
,曲线
在
,
两点处的切线斜率分别为
,
,求证:
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3348778fd42e9d895afdbc088c7044e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb49dbba01c4ff5f686ffc8828351b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37708a68d0ca72413ada85d01d2ed19.png)
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2018-12-12更新
|
1001次组卷
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10卷引用:重庆市第三十七中学校2018-2019学年高二下学期期中(理)数学试题
重庆市第三十七中学校2018-2019学年高二下学期期中(理)数学试题重庆大学城第一中学校2018-2019学年高二下学期第一次月考数学(理)试题甘肃省武威第一中学2019-2020学年高二下学期期中考试数学(理)试题甘肃省庆阳市华池县第一中学2022-2023学年高一下学期期中数学试题(已下线)2018年12月12日 《每日一题》一轮复习【文】-直接证明与间接证明(已下线)2018年12月11日 《每日一题》一轮复习【理】-直接证明与间接证明(已下线)2019年3月24日 《每日一题》理数选修2-2-每周一测河南省郸城第二高级中学2019-2020学年高二下学期网上学习数学(一)理科试题吉林省梅河口市第五中学2019-2020学年高二4月月考数学(文)试题河南省洛阳市豫西名校2020-2021学年高二下学期第一次联考文科数学试题
名校
解题方法
9 . 已知函数
.
(1)当
时,求曲线
在点
处的切线方程;
(2)若函数
有两个极值点
,且
.
①求
的取值范围;
②求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0abf9e3e11d3a9813977a7f91398fc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fcaaec3edd0edfa39468f60dc522cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f4eff3125c5e63a994ba1ad5be58e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3907da01aa2971e05262ecf58bafe27d.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694c99143dcd6fdc8138efa03d0c3350.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223f8ddc0c1bb794e4c4a948912e289f.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15befbdad977723a86194979c675ee5d.png)
②求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fade07c8b069a453b08c1e6c3b9ef896.png)
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10 . 已知函数
.
(Ⅰ)若
在
上单调递减,求
的取值范围;
(Ⅱ)当
时,函数
有两个极值点
,
证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a08c4201ec98d78c2c8f8d092a2adb.png)
(Ⅰ)若
![](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)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e409849c921f4868c5a78abffb9f74bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dae74c724114bfeff024dd7b79f5edc.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ca13a93b5f401c0d39ba52b0cffcb0.png)
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2018-04-26更新
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2卷引用:重庆市永川北山中学校2019届高三上学期期中数学试题