1 . 已知椭圆
的左焦点为
,离心率为
.
(1)求椭圆
的标准方程;
(2)过点
的直线与椭圆交于
两点,O为坐标原点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030700126fb012f13935f57780b96677.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
您最近一年使用:0次
2020-03-13更新
|
679次组卷
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3卷引用:贵州省遵义市红花岗区部分学校2022-2023学年高二下学期期中考试数学试题
2 . 已知数列
的前
项和为
,且
对任意
都成立.
(Ⅰ)求
的值;
(Ⅱ)证明数列
是等比数列,并求出数列
的通项公式;
(Ⅲ)设
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f40a1e521341a31cb2e91f403fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0158862238e250d2a2598b7d4ecd148.png)
(Ⅱ)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a080c94bf1ffea8d5af10f9688978fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0f044dc82a12fd1c71872f2ac12d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2020-03-09更新
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1567次组卷
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4卷引用:贵州省铜仁市伟才学校2019-2020学年高一下学期期中考试数学试题
3 . 定义域为
的函数
满足
,且对
恒有
,且
,则不等式
的解集是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf116ecbdb894c1d05d5b3b5203c10a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5973b37d49a18394b019a2608144c247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a57d6d7b74ae630e6ce3b43afe6060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4566dd73a3d11ccde4cb319d323c87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cbb47080afc6ed336950a0fc2b04cc.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 有下列四个判断:①若
在
上是增函数,则
;②函数
只有两个零点;③函数
的最小值是1;④在同一坐标系中,函数
与
的图象关于
轴对称.其中正确的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4b369f86d13d19556d0ae4f7aece51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c298e3b72856ab70082079d5105e8873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beba11e97fb6b0cb4aa1528530c6f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b161347f6a2fcfd9bf0acf1e8a03fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef9d69de06c1300c314c3c6623abb1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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2020-01-15更新
|
244次组卷
|
2卷引用:贵州省六盘水市第七中学2019-2020学年高一上学期期中数学试题
5 . 已知函数
是偶函数.
(1)求
的值;
(2)若函数
的图像与
的图像有交点,求
的取值范围;
(3)若函数
,是否存在实数
使得
最小值为1,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07645facfe2b534337baeb89a804257.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a16a128d07b4d4232f79d013c14ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96d6dfbe351503f4318fc484f78c63ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
6 . 已知函数
.
(1)若
对任意实数
都成立,求实数
的取值范围;
(2)若关于
的方程
有两个实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa2f6ca1a8665a5de503c66cf2b12bf3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a308a25e0202f799ecd2117527da7aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c85057aab5f4896e994267cdc6b747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-12-28更新
|
1553次组卷
|
8卷引用:贵州省黔东南苗族侗族自治州东南州名校2019-2020学年高一上学期期中数学试题
7 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c12a8835f3ed3f5c7a060911946e0.png)
.
(1)若函数
的图象与直线
没有交点,求
的取值范围;
(2)设
,若函数
与
的图象有且只有一个公共点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c12a8835f3ed3f5c7a060911946e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6889205677dfb9a02934c36088b75d7f.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87490be8d0cdb7bc6c39d1a37f3bc335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93ed822df732ce783515fe5b3d324e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
8 . 已知函数
,函数
,若函数
恰有4个零点,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a1d3dbbdf83b8da6854e4327b3025e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3a7e0d1ae2fb7467c29b381f5dda5f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b7c2420c387be8882df4359ac10b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-06-05更新
|
1749次组卷
|
5卷引用:贵州省黔西南布依族苗族自治州兴义市第八中学2019-2020学年高一上学期期中数学试题
名校
9 . 某小区拟对如图一直角△ABC区域进行改造,在三角形各边上选一点连成等边三角形
,在其内建造文化景观.已知
,则
面积最小值为____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def073bb68959ab3befba5c1550eb170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/77f85e2e-b506-417a-9ce8-969772724bdc.png?resizew=173)
您最近一年使用:0次
2019-05-29更新
|
1319次组卷
|
2卷引用:【市级联考】贵州省遵义市2018-2019学年高一下学期期中考试数学试题
名校
10 . 已知两个等差数列
和
的前n项和分别为
和
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd4197ce831f2a64cb5e5de3acf8db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d73dab898bafa3adea84f50001b3d8.png)
A.![]() | B.![]() | C.![]() | D.15 |
您最近一年使用:0次
2019-05-29更新
|
2828次组卷
|
7卷引用:【市级联考】贵州省遵义市2018-2019学年高一下学期期中考试数学试题