1 . 已知函数
(
).
(1)若
时,求函数
的值域;
(2)若函数
的最小值是1,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0aa958bf8099be6d4a4df71e2f6757e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b6855ff38858f4c62013c46a0aa3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-09-16更新
|
1598次组卷
|
10卷引用:2016-2017学年云南曲靖一中高一上期中数学试卷
2016-2017学年云南曲靖一中高一上期中数学试卷2014-2015学年广东省肇庆市高一上学期期末考试数学试卷2015届广东省肇庆市中小学教学评估高中毕业班第二次模拟文科数学试卷2014-2015学年山东省枣庄市十八中高一上学期期末考试数学试卷(已下线)2018年12月29日 《每日一题》(理数)高考二轮复习-周末培优(已下线)2018年12月29日 《每日一题》(文数)高考二轮复习-周末培优智能测评与辅导[文]-指数函数、对数函数、幂函数辽宁省实验中学分校2019-2020学年高二下学期期末数学试题四川省泸州市泸县第五中学2021-2022学年高一上学期期中考试数学试题江苏省盐城市响水中学2022-2023学年高一上学期期中数学试题
2 . 已知中心在原点
,焦点在
轴上的椭圆,离心率
,且椭圆过点
.
(Ⅰ)求椭圆的方程;
(Ⅱ)椭圆左,右焦点分别为
,过
的直线
与椭圆交于不同的两点
,则△
的内切圆的面积是否存在最大值?若存在,求出这个最大值及此时的直线方程;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/ef8c7c8abf34445691abfcf3b8474ecd.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/87214d3ff36f4afab32588b7faa98e04.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/0e0f9251b16c4729b573c322c26ba170.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/9c6f5d3044074fbfa3d95f8cf734c8df.png)
(Ⅰ)求椭圆的方程;
(Ⅱ)椭圆左,右焦点分别为
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/7603eb863e9b47eeb129a720d6e2753d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/e9121bdfc66c47adbabf7802c17c34b9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/ee82ff2c236a4314a9b35ebc2129cfc0.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/2aeb2a9534094ade9deb0884795ce795.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572475946565632/1572475952586752/STEM/be524cedd86344a898ed4f5eb9089a66.png)
您最近一年使用:0次
名校
解题方法
3 . 已知椭圆
,
,
为其左、右焦点,
为椭圆
上除长轴端点外的任一点,
为
内一点,满足
,
的内心为
,且有
(其中
为实数),则椭圆
的离心率
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c043d5e847c15f00af2c4633949680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364602b9f1646d858197dffd749050f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c043d5e847c15f00af2c4633949680.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f3eb755e701f8eddd60829db33574c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-04-26更新
|
2790次组卷
|
5卷引用:2016届云南玉溪市高三第三次教学质检数学(理)试卷
2016届云南玉溪市高三第三次教学质检数学(理)试卷江西省新余市2018届高三第二次模拟考试数学(理)试题2020届安徽省合肥市肥东县高级中学高三下学期4月调研考试数学(理)试题(已下线)第38练 椭圆-2021年高考数学(理)一轮复习小题必刷湖南省长沙市周南中学2021-2022学年高二上学期第三次月考数学试题
名校
4 . 已知椭圆
的离心率为
,且过点
.
(1)求椭圆
的方程;
(2)设
是椭圆
长轴上的一个动点,过点
作斜率为
的直线
交椭圆
于
两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937dbb96343b8a9e52718e785e9eda43.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a430c41f782c5c12f68a49c5d0cb1ee2.png)
您最近一年使用:0次
2017-11-09更新
|
1099次组卷
|
3卷引用:2017届云南四川贵州高三上学期百校大联考数学(文)试卷
名校
解题方法
5 . 若存在两个正实数
,使得等式
成立,其中
为自然对数的底数,则实数
的取值范围为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3b6606f51981341f7af32b6af4d863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-11-09更新
|
732次组卷
|
5卷引用:2017届云南四川贵州高三上学期百校大联考数学(文)试卷
2017届云南四川贵州高三上学期百校大联考数学(文)试卷2016届河南省禹州市名校高三三模文科数学试卷四川省成都市新津中学2018届高三11月月考数学(理)试题(已下线)专题16 函数与导数常见经典压轴小题全归类(精讲精练)-2(已下线)专题06 函数与导数常见经典压轴小题归类(练习)-1
名校
6 . 设
为数列
的前
项和,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9e524e6a03523e86f9529a17bee07.png)
__
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a98624ef2334d4b64587b3ef6e50a33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9e524e6a03523e86f9529a17bee07.png)
您最近一年使用:0次
2017-03-29更新
|
2003次组卷
|
6卷引用:2016届云南省曲靖一中高考复习质量监测五文科数学试卷
7 . 在平面直角坐标系
中,曲线
(
为参数),其中
,以
为极点,
轴的正半轴为极轴的极坐标系中,曲线
,射线
,设射线
与曲线
交于点
当
时,射线
与曲线
交于点
,
,
;当
时,射线
与曲线
交于点
,
.
(1)求曲线
的普通方程;
(2)设直线
(
为参数,
)与曲线
交于点
,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/310831bb3970fa63f0777294265b88dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629b1f2a6edecc38c28dc69a701de256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5609d7248ee9234c637285081cf87d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51cc689a7ccf4acfd2d5ecba23e9768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c197fbc2ef57f0a97dc6ac7d121b1dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc316f251b316a8a62c60017289cc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60893ffa85550cbd68549e3224a9f57e.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7571c1e8fa1594aaa2f3e150d6591a4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e2c8d466ab8eb5ecd38060b53bbe8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce82ac8555e0d0a670b5bf6e2ec28374.png)
您最近一年使用:0次
8 . 已知等差数列
是递增数列,
,若
构成等比数列,则![](https://img.xkw.com/dksih/QBM/2016/6/7/1574337471602688/1574337804541952/STEM/5bdfc1008c1b4dd084a26c9f6d512693.png?resizew=45)
_________ .
![](https://img.xkw.com/dksih/QBM/2016/6/7/1574337471602688/1574337804541952/STEM/87d0e1f1dc554943bc9d6ed4b921e649.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1574337471602688/1574337804541952/STEM/f1ad1c67c150424a9a306b6ed2e04ef7.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1574337471602688/1574337804541952/STEM/605031e5ad724147b927378928b1f4f7.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1574337471602688/1574337804541952/STEM/5bdfc1008c1b4dd084a26c9f6d512693.png?resizew=45)
您最近一年使用:0次
解题方法
9 . 已知函数
.
(1)若
恒成立,试确定实数
的取值范围;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adcd74b99f824e4b2a5e10256deb181.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04eb051cfbf9380284076f1e3222a70.png)
您最近一年使用:0次
10 . 已知椭圆
,作直线
交椭圆
于
两点,
为线段
的中点,
为坐标原点,设直线
的斜率为
,直线
的斜率为
.
(1)求椭圆
的离心率;
(2)设直线
与
轴交于点
,且满足
,当
的面积最大时,求椭圆
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1497ffc1b18295b5f12c4a566a3285e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3f83207f8afca69fe8c0e195dc8e78.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1ff4b88fc5e2c60d0836923ff69b93.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573018074513408/1573018080681984/STEM/d57dc627077e492ab6f41e4b6c7ae4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17bcffba755a9cb6e159baf59ebeb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2016-12-04更新
|
709次组卷
|
2卷引用:2016届云南玉溪市高三第三次教学质检数学(理)试卷