解题方法
1 . 已知动点
与定点
的距离等于点
到
的距离,设动点
的轨迹为曲线
.椭圆
的一个焦点与曲线
的焦点相同,且长轴长是短轴长的
倍.
(1)求
与
的标准方程;
(2)有心圆锥曲线(椭圆,圆,双曲线)有下列结论:若
为曲线
上的点,过点
作
的切线
,则切线
的方程为
.利用上述结论,解答问题:过
作椭圆
的切线
(
为切点),求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)有心圆锥曲线(椭圆,圆,双曲线)有下列结论:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38800148262fa23e5a973a3bd355a9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb853f87f7a95e481f9126426afbe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436a0e9cea21b0174bc40e2af8cc03f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03df57efff473b3cfeb8503796b7d6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
您最近一年使用:0次
2024-02-19更新
|
113次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
解题方法
2 . 已知双曲线
过点
,离心率为
,斜率为k的直线l交双曲线C于A,B两点,且直线
的斜率之和为0.
(1)求双曲线C的方程;
(2)是否存在直线l,使得
是以P为顶点的等腰三角形,若存在,求出直线l的方程;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
(1)求双曲线C的方程;
(2)是否存在直线l,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
您最近一年使用:0次
2024-02-19更新
|
119次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
3 . 直线
在y轴上的截距为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5588869f5f671d8fd221d871846a4b.png)
A.![]() | B.![]() | C.1012 | D.2024 |
您最近一年使用:0次
2024-02-19更新
|
279次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
4 . 九连环是我国从古至今广为流传的一种益智游戏,它用九个圆环相连成串,以解开为胜.《红楼梦》中有林黛玉巧解九连环的记载.九连环一般是用金属丝制成圆形小环九枚,九环相连,套在条形横板或各式框架上,并贯以环柄.玩时,按照一定的程序反复操作,可使9个环分别解开,或合二为一,假设环的数量为
,解开n连环所需总步数为
,解下每个环的步数为
,数列
满足:
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfbe2bceb9a5641301ae1d6c8cad82c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c752ebe8516e7d3327f3410473d9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7110f600351b404b84e6d252d36b4ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54633f3082c5425adc3640fa3d91babc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/778876a3-90a0-4ee5-b34a-6f8bb7fb343a.png?resizew=158)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-02-19更新
|
157次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
解题方法
5 . 如图,四棱锥
中,
都为等腰直角三角形,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/9fcd1a7c-8c83-40d5-86f3-d0d6d0099a79.png?resizew=155)
(1)
与平面
是否平行?请说明理由;
(2)求
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c389698ce917ffbc9c35879932f497e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e624e6ee68b796f70f9d35e78a8aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/9fcd1a7c-8c83-40d5-86f3-d0d6d0099a79.png?resizew=155)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2024-02-19更新
|
92次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
解题方法
6 . 直线
与抛物线
交于A,B两点,则
(O为抛物线顶点)的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b0ba14e41e306e5633ad4bf1cdedd8.png)
A.![]() | B.![]() | C.4 | D.12 |
您最近一年使用:0次
2024-02-19更新
|
196次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
解题方法
7 . 已知圆
,直线
.
(1)求m的取值范围;
(2)当圆
的面积最大时,求直线
被圆
截得的弦长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f125ef195701ffbc4881322f138ae78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aefcbc03a5c916ebb20f891a0fe7e0d.png)
(1)求m的取值范围;
(2)当圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2024-02-19更新
|
203次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
8 . 方程
(m为常数)表示的曲线可能是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8495190a152940f97a434049642b196.png)
A.两条直线 | B.椭圆 | C.双曲线 | D.抛物线 |
您最近一年使用:0次
9 . 已知
,平面
的法向量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec5dcb85048fd5745a7601b36e2dfb7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeb0d951634bb1e4e5d2b5e4eb2b8aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398a7cdc39e756d8f7f7ee1185579b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
您最近一年使用:0次
2024-02-14更新
|
122次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷
解题方法
10 . 已知数列
满足
.且
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12ce286eae260841326f66865ff777a.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca92b1bb8c695bd37144136ea1c887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b7adab471d41ac1b0451f07ab94aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12ce286eae260841326f66865ff777a.png)
您最近一年使用:0次
2024-02-14更新
|
319次组卷
|
2卷引用:河南省信阳市固始县2023-2024学年高二上学期期末考试数学试卷