解题方法
1 . 由9个正数组成的矩阵
中,每行中的三个数成等差数列,且
、
、
成等比数列,下列判断正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d537d58c1657629b053368830666779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb9d1aa1cc02e6fe13141ecf5f2549b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bab5310774cd482fffd19586983b44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699f39dd97b907f10708e0dc75076f8a.png)
A.第2列![]() ![]() ![]() |
B.第1列![]() ![]() ![]() |
C.![]() |
D.若9个数之和等于9,则![]() |
您最近一年使用:0次
解题方法
2 . 已知数列
是等差数列, 前n项和
,若满足
,则使
最大的
为 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8a030202a1bf486f745cf0e16705f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.2021 | B.2022 | C.4041 | D.4042 |
您最近一年使用:0次
名校
解题方法
3 . 已知
,
,是椭圆
(
)的左,右焦点,P为椭圆上一点,
为等腰三角形,
,则C的离心率为________ .
![](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/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d72bbe8e3153ec9b618f1c14c5cec6d.png)
您最近一年使用:0次
2023-12-11更新
|
761次组卷
|
2卷引用:浙江省杭州高级中学2021-2022学年高二上学期期末数学试题
名校
解题方法
4 . 已知双曲线
的左、右顶点分别是A,B,右焦点为F,点P在过F且垂直于x轴的直线l上,当
取得最大值时,点P恰好在双曲线上,则双曲线的渐近线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 如图,点
为抛物线
上位于第一象限的一点,F为抛物线焦点,满足
.
(1)求抛物线C的方程;
(2)点M为直线
上的动点,H为点E关于x轴的对称点,连接
、
分别交C于点A、B,连接
交直线l于点N.
①求证:直线
过定点;
②求证:以
为直径的圆过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dd0829b0b8c2ff6f0229a1333dbc5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ceb1c169f659ef1ef183c8c65b9daff.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/4a29ec81-6b43-46f6-8cdb-2c769160b79b.png?resizew=170)
(1)求抛物线C的方程;
(2)点M为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b556b1a9944719cf423e90f8df16c773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83042953e7f15e984b2da2ee9ca678d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
①求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②求证:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
6 . 已知数列
的前n项和为
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.若点![]() ![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2023-12-11更新
|
1431次组卷
|
8卷引用:浙江省杭州高级中学2021-2022学年高二上学期期末数学试题
浙江省杭州高级中学2021-2022学年高二上学期期末数学试题(已下线)模块一 专题5 等差数列与等比数列 期末终极研习室(2023-2024学年第一学期)高二人教A版湖南省邵阳市邵东市第一中学2023-2024学年高二上学期12月月考数学试题陕西省咸阳市高新一中2023-2024学年高二上学期第三次质量检测数学试卷福建省龙岩市新罗区龙岩学院附属中学2023-2024学年高二上学期第二次月考数学试题(已下线)第四章 数列(单元测试)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第二册)(已下线)模块一 专题1 数列基础、等差数列和等比数列【讲】高二下人教B版(已下线)模块一 专题2 数列基础、等差数列和等比数列【讲】高二下北师大版
名校
解题方法
7 . 已知数列
的首项
,前n项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59314e0280741478d339d001e567b4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
您最近一年使用:0次
名校
解题方法
8 . 设F为双曲线
(
,
)的右焦点,O为坐标原点,以
为直径的圆与圆
交于P,Q两点,满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/c9083e8a-6d1f-4b3f-80d4-fe5c87e386c9.png?resizew=207)
(1)求C的离心率;
(2)若
,点A在双曲线C上,点B在直线
上,满足
,试判断直线
与圆O的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5c2e64358e0ec7aa142c336d970306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b96eda0601673fafb836643969914f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810b827e1634c51c48baf4471ef51b63.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/10/c9083e8a-6d1f-4b3f-80d4-fe5c87e386c9.png?resizew=207)
(1)求C的离心率;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94188fea61c347a150744709920d96e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
名校
9 . 如图,四棱锥中,底面
为直角梯形,其中
,
,面
⊥面
,且
,点
在棱
上.
(1)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b54647a7c34d1046c8d6c198d3654d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e97bd4e9a6cfde753bfbd6e36136c57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135a12aa48eb33bf5116662e0f9f0799.png)
您最近一年使用:0次
2023-12-11更新
|
775次组卷
|
2卷引用:浙江省湖州市天略高中2021-2022学年高三上学期期末模拟数学试题
10 . 已知函数
在定义域内有两个不同的零点
,.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e691e5d64f7bad4e1c8b88a7bd06d8.png)
(2)已知
,若存在
,不等式
对任意的
总成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8455b635d88ac4725388276171e401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94e691e5d64f7bad4e1c8b88a7bd06d8.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a09145206ea1060dbba927a9d12569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a994d7c2cc2284c69d1a90fe78814056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次