解题方法
1 . 已知函数
.若曲线
在其上一点
处的切线与直线
平行,求
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6eb7cf32a955f0e376640cbdd845a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4b0eba587d0af5c665a8f909df5104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
解题方法
2 . 已知函数
的图象在点
处的切线方程为
.
(1)求实数a,n的值;
(2)求函数
在区间
上的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0168b47d36eac2b19b5cfc315d4d2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/150e8e4ca6aa729a72a6a17c36b8ebfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a53007312cb7e74585b9023bd856bc9.png)
(1)求实数a,n的值;
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3c72c53b0d3512a12ccab0236e7941.png)
您最近一年使用:0次
2024-05-04更新
|
436次组卷
|
2卷引用:河南省部分学校(金科)大联考2023~2024学年高二下学期第一次质量检测数学试题
3 . 如图,在三棱锥
中,
平面
分别为
的中点.平面
与平面
的交线为l.
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf63858895040e7ce2b838057267151f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf43f0530ae36096a0c1acdfd793845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f245930493e628ddf029fcf653b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e7344dca1e40bf072371ddd5640111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbe5de909b009cd31d076b19faa579f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80ee756cb5e4b3cb5f0ddc53d75647e.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05479863cf9f41e2ad9f843ea740a3c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
您最近一年使用:0次
4 . 若数列
的前n项和
满足
.
(1)证明:数列
是等差数列;
(2)设
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60731199951ce85cc66ad6b79c7eaaf4.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab14f13b4576efd3b8a2752e201e81f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
名校
解题方法
5 . 已知椭圆
:
的左、右焦点分别为
,
,过点
作x轴的垂线与椭圆交于M,N两点,
,
.
(1)求椭圆C的标准方程;
(2)若椭圆C的上顶点为P,直线l与该椭圆交于A,B两点(异于上、下顶点),记直线PA的斜率为
,直线PB的斜率为
,且
,证明:直线l过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.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/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cbdd945cdadb7dca0d281d791374573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f1e02c7c258970e28c4854c36c9dc8.png)
(1)求椭圆C的标准方程;
(2)若椭圆C的上顶点为P,直线l与该椭圆交于A,B两点(异于上、下顶点),记直线PA的斜率为
![](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/1ec7bcf5820dfe70290259c2d7ac1ea5.png)
您最近一年使用:0次
2024-04-07更新
|
513次组卷
|
2卷引用:河南省部分学校(金科)大联考2023~2024学年高二下学期第一次质量检测数学试题
名校
6 . 已知函数
在
处取得极值.
(1)求
的值;
(2)设
(其中
),讨论函数
的单调性;
(3)若对
,都有
,求n的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019bd00539e0ed5419f52123604a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c9d8013ef0b3c521e332f13d2b713d3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b143615d9543e4cfa53a1d67b7a89b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f26cade8fb52ae18a5258ec4e522e4.png)
(3)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925db96ca0f7546def751a2e47cc71b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915679bdefbc95ce9a3a080bf559d3b.png)
您最近一年使用:0次
2024-04-07更新
|
176次组卷
|
2卷引用:河南省部分学校(金科)大联考2023~2024学年高二下学期第一次质量检测数学试题
7 . 如图,在几何体
中,平面
平面
,四边形
为正方形,四边形
为平行四边形,四边形
为菱形,
为棱
的中点,点
在棱
上,
平面
.
(1)证明
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee4915234cd5311d3b5e384b82caa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e50d31a3f637f9632a947f0866eede1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b808a8facf9af30cd8a083010a7b850d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49a261ac5fac66509272f669f5728f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/14/bddb6519-9ff9-457f-ba88-e6131b9a975e.png?resizew=161)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5888bec948373f3854258ad80171073d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2024-04-07更新
|
1381次组卷
|
2卷引用:河南省周口市西华县第三高级中学2023-2024学年高二下学期第一次月考数学试题-
名校
解题方法
8 . 已知椭圆
:
的短轴长为
,且椭圆
经过点
.
(1)求椭圆
的方程;
(2)若过点
的直线与椭圆
相交于
,
两点,且
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7950b79b4e43d650ca5d84e9fce65540.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23baf026a1dd9532845c195a428d8e76.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2024-04-07更新
|
653次组卷
|
3卷引用:河南省周口市西华县第三高级中学2023-2024学年高二下学期第一次月考数学试题-
名校
解题方法
9 . 如图,在空间直角坐标系
中,四棱柱
为长方体,
,点
为
的中点,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd407cdb6c758cdbe7e7216544f85b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce34c05c1445e027e9fc009907046e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c8b9d5680c06f9e28c311d67cfadd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://img.xkw.com/dksih/QBM/2024/3/28/3463332106461184/3464077086294016/STEM/502a38b4235b41deb5e06261ecf054f3.png?resizew=168)
您最近一年使用:0次