1 . 已知
为实数,函数
.
(1)是否存在实数
,使得
在
处取得极值?证明你的结论;
(2)设
,若
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424bf677188d4f17926f0ba4cf541748.png)
(1)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cb21668b08a53f25763f27bfa8a92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269af6957cfd97102ca38ba76f8a1720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b9bfb5c6f9dbc1dc0727c8afeaef19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2013·福建福州·一模
解题方法
2 . 对于函数
与
和区间D,如果存在
,使
,则称
是函数
与
在区间D上的“友好点”.现给出两个函数:
①
,
;
②
,
;
③
,
;
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
,
,
则在区间
上的存在唯一“友好点”的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/9c9cf1c50d14407e9fc94e5a75647859.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/6b1be4c3444e44b8a5ca5a9c36b843d3.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/2476a0989d2d489db5238542ef6d70cf.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/ebe7ebb8ef4744dd9cf3e536ed51e1a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/9c9cf1c50d14407e9fc94e5a75647859.png)
①
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/8862d85adda74bfab2e3ef2c3885c6cc.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/e9545e0ab540407b945bfd56c8b30dac.png)
②
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/fe068eabba534bf2bf3c3d6e00817614.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/e3baaa3600094ef3a9ac9bf77a2efb8a.png)
③
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/547089f72c4245f68b7619f34aa453ea.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/0f1dfbf45eb1413388016bf01f7cfd21.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/acae5c95a39f496ba4f4c5dcc4f4cc6f.png)
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/6936d62bc9604e27a89da850e0624543.png)
则在区间
![](https://img.xkw.com/dksih/QBM/2013/9/4/1571340182110208/1571340187705344/STEM/e1d4153dcc2a48f3b689b389b7aa7f1b.png)
A.①② | B.③④ | C.②③ | D.①④ |
您最近一年使用:0次
12-13高二下·福建泉州·期中
名校
3 . 已知函数
.
(1)若函数
上是减函数,求实数a的最小值;
(2)若
,使
(
)成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0cf8ad6095ad29bc61525bb4c56b44d.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9f3b80a71a487a027002a33b2660cc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1970aadd086db2660bc7ef3957a458dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579cf0a235a9b56cdf4e2f95cc67800b.png)
![](https://img.xkw.com/dksih/QBM/2014/1/21/1571495454474240/1571495460290560/STEM/b6d9c648b6c244f4844560a422d6dddc.png?resizew=39)
您最近一年使用:0次
2016-12-02更新
|
2347次组卷
|
15卷引用:2012-2013学年福建省泉州一中高二下学期期中考试文科数学试卷
(已下线)2012-2013学年福建省泉州一中高二下学期期中考试文科数学试卷2015-2016学年福建上杭一中高二下培优补差理科数学试卷(已下线)2012-2013学年黑龙江省鹤岗一中高二下学期期末考试理科数学试卷(已下线)2014届河南省安阳市高三上学期调研测试理科数学试卷(已下线)2014届云南省部分名校高三12月联考理科数学试卷(已下线)2013-2014学年山东省淄博六中高二下学期期中考试理科数学试卷2015届安徽省淮北市高三第一次模拟考试理科数学试卷2016届云南省昆明三中高三下第一次月考理科数学试卷湖南省株洲市醴陵第二中学、醴陵第四中学2018届高三上学期两校期中联考数学(理)试题(已下线)《2018届优生-百日闯关系列》数学专题三 第六关 以函数、不等式与导数相结合的综合问题为解答题江西省南康中学2017-2018学年高二下学期第一次月考数学(理)试题【全国市级联考】山西省运城市2017-2018学年高二下学期期中考试数学(理)试题【全国市级联考】安徽省芜湖市2018届高三5月模拟考试文科数学试题2015年全国高中数学联赛黑龙江赛区预赛试题云南省保山市保山第一中学2018-2019学年高二下学期期末数学试题
2010·北京石景山·一模
名校
4 . 已知函数
.
(Ⅰ)若
,求曲线
在点
处的切线方程;
(Ⅱ)若函数
在其定义域内为增函数,求正实数p的取值范围;
(Ⅲ)设函数
(
为自然对数底数),若在
上至少存在一点
,使得
成立,求实数p的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea25bf65d4e08ef94224efe45b16844a.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7acff98078cdd32804d8f1c4efbe2ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5828873f8369183faf71181cda5b61d2.png)
(Ⅱ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅲ)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6357128f4acb43012e75092454d3f633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579e2c39e6c0a640357e3b0ccd6f954a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae17887ccf795c630b89ff5c9f72813a.png)
您最近一年使用:0次
2016-12-03更新
|
2388次组卷
|
18卷引用:2013-2014学年福建省福州第八中学高二下学期期中考试理科数学试卷
(已下线)2013-2014学年福建省福州第八中学高二下学期期中考试理科数学试卷(已下线)北京市石景山区2010届高三一模考试(数学理)(已下线)浙江省嵊州一中2011届高三上学期期中考试数学试题(理)(已下线)2011-2012学年浙江省杭州市萧山五校高二下期中联考文科数学试卷(已下线)2012-2013学年浙江省北仑中学高二(9、10班)下期中考试数学卷(已下线)2012-2013学年辽宁省宽甸二中高二下学期期中考试理科数学试卷(已下线)2012-2013学年浙江省北仑中学高二(2-6班)下期中考试数学卷(已下线)2014届陕西省西工大附中高三下学期第八次适应性训练理科数学试卷2016届湖南省长沙市长郡中学高三下第六次月考理科数学试卷12016届湖南省长沙市长郡中学高三下第六次月考理科数学试卷22015-2016学年湖北省襄阳五中高二3月月考文科数学试卷浙江省宁波市北仑中学2016-2017学年高二下学期期中考试数学试题辽宁省沈阳市东北育才学校2018届高三上学期第一次模拟考试数学(理)试题河北省临漳县第一中学2018届高三上学期第一次月考理科数学试题【全国区级联考】重庆市江津区2018届高三下学期5月预测模拟文科数学试题【校级联考】湖北省部分重点中学2019届高三上学期期中考试数学(理科)试题【全国百强校】四川省遂宁市第二中学2018-2019学年高二下学期期中考试数学(理)试题天津四中2017-2018学年高二下学期期中数学试题
12-13高三上·江西南昌·期中
名校
解题方法
5 . 已知
,函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b34d866f0382612f62cb17ba459d92a.png)
(1)求
的极小值;
(2)若
在
上为单调增函数,求
的取值范围;
(3)设
,若在
(
是自然对数的底数)上至少存在一个
,使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d1dbacb32c6aa64b346cfc40c5e7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b34d866f0382612f62cb17ba459d92a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e1e04a33fea06eee81dbf32945a562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130ab7a635323d182a0da76e9fe25aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7555fac1d8eaee8a92cb2f7c60baadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811c6fbc93bafee69ded75316ef05122.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e161102cc09b6c718003436ecfe2fb68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2016-12-02更新
|
1551次组卷
|
6卷引用:福建省上杭县第一中学2022届高三暑期月考数学试题
福建省上杭县第一中学2022届高三暑期月考数学试题(已下线)2013届江西南昌八一、洪都、麻丘中学高三上期期中理科数学试卷(已下线)2013届山东省莱芜市第一中学高三12月测试文科数学卷(已下线)2013届河南郑州盛同学校高三4月模拟考试理科数学试卷2016届吉林四平一中高三五模理科数学试卷湖南省长沙市广益实验中学2020-2021学年高三上学期第一次新高考适应性考试数学试题
12-13高三上·福建福州·期末
6 . 已知
、
R,函数
.
(1)当
时,
(i)若
(1)
,求函数
的单调区间;
(ii)若关于
的不等式
在区间
,
上有解,求
的取值范围;
(2)已知曲线
在其图象上的两点
,
处的切线分别为
、
.若直线
与
平行,试探究点
与点
的关系,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a64084f262c0032e60216b660f19a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15efad598bcf7c5176775f6a4597d9dd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2a51944c720568f35d443589dfc1aa.png)
(i)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90bae886c8ab958aa4c693bf8e0627d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(ii)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a81c366d9a8b3b61fd3bda66f59cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f124fb9eab689c537bb5ddf5012e35f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45340678c2ec1bc8cd68c0a3a2ab8902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)已知曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dddee525114c09ee0d1205aed6e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a17b5f16272dccf3c8ccc0a586d30c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
11-12高三上·福建厦门·阶段练习
解题方法
7 . 已知函数
(
是自然对数的底数)
(1)求
的最小值;
(2)不等式
的解集为P, 若
且
,求实数
的取值范围;
(3)已知
,且
,是否存在等差数列
和首项为
公比大于0的等比数列
,使数列
的前
项和等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0107fb8d4cb3a9b6311fa639ca514b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8ffb5afc3de70c4fcd054c492a6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7729c3c3e86a2ee0c3f8edff8282178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c9f7fe82ce33779868c7e319a0133d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c0eda754a9ad60eadc8eb1b83d0d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74156327e5659301f391814605688899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5344eadd4711db34e3f935aedd5fb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
11-12高三上·福建厦门·阶段练习
解题方法
8 . 已知函数
.
(1)当
时,求
的单调递增区间;
(2)求证:曲线
总有斜率为
的切线;
(3)若存在
,使
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bafd123e9556528f33e0732825b3a20.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求证:曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca97e3aa8061c4d8e621c5598c69b13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2010·福建泉州·一模
9 . 已知函数
(
,
为自然对数的底数)
(1)若
,求函数
的极值;
(2)若
是函数
的一个极值点,试求出
关于
的关系式(用
表示
),并确定
的单调区间;
(3)在(2)的条件下,设
,函数
.若存在
使得
成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/919376047f0947b60970e79dfff4f3f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600379d4a993514aaaeed551de58293a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac661cc2afb190aadba5e3e226546bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea356f56cae05f3f6edb7cea1adaba68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68adcd21eadf14dfcc0687f88df6fc65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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