名校
解题方法
1 . 已知椭圆
的上、下顶点分别是
,点P(异于
两点),直线PA与PB的斜率之积为
,椭圆C的长轴长为6.
(1)求C的标准方程;
(2)已知
,直线PT与椭圆C的另一个交点为Q,且直线AP与BQ相交于点D,证明点
在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc48b2f1fe89050e80db7369248c789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b889efe020137b112bfafaa8e0becda4.png)
(1)求C的标准方程;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f134c358bb5b5fa06c935a47c4ebf10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
2024-02-04更新
|
359次组卷
|
5卷引用:青海省2024届高三上学期协作联考数学(理科)试题
2 . 如图,在三棱柱
中,
平面
是等边三角形,且
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5e3a1fb5-8856-4417-8c32-88371c81afeb.png?resizew=120)
(1)证明:
;
(2)若
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770abdd10660689c605577f9cb6d9db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/788413f4b19a32c68133cf7d70718ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845d23d291d2434a7a7a428ebe302751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/23/5e3a1fb5-8856-4417-8c32-88371c81afeb.png?resizew=120)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0393cbb10ead0c3c08e5f50d974687e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62d36fe68976766ee677299aa5768c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3881272aeb1e540d1f3215ce281cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf066f26f4f904c430d429403f22da2.png)
您最近一年使用:0次
2024-01-24更新
|
495次组卷
|
2卷引用:青海省2024届高三上学期协作联考数学(理科)试题
解题方法
3 . 已知双曲线
的一条渐近线方程为
,左焦点为
,则
的实轴长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ed6d0a4a22c4886b0fca20ea54af1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c12672feab4b7d2f8c0dc3367e8fd915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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4 . 已知函数
为定义在
上的奇函数,命题
,命题
,
,则下列命题中为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93bc0eb442cdaae7d986b44d0697b636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504a5ec4dc5fff493fe03544bba94f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79475a91ed4cdd481a8f89a0c00ed5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9a5771ebe812b47c4acaf222ecc4c3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 已知函数
,其中
为常数.
(1)求
的最小值;
(2)若
,求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4490503c29b1743ca34b05e900d8730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef118cce5443a4d794561f5ef8e1fcc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9251b025e640117a755903935f833493.png)
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6 . 在正四棱台
中,
,点
在底面
内,且
,则
的轨迹长度是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b893c7da2b26d7576a05bb6a887b2887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9df53c3a9b1c3691d8f216fd3139763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解题方法
7 . 如图,直径
的半圆,
为圆心,点
在半圆弧上,
为
的中点,
与
相交于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8cf2c180edcb0dcc32bbb0b8776cc2.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.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/9044baf40c4b0fcd4961b35af8a073c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8cf2c180edcb0dcc32bbb0b8776cc2.png)
![](https://img.xkw.com/dksih/QBM/2024/1/2/3402663843733504/3403066499997696/STEM/2884fe71d1504029bef0165f6fc47762.png?resizew=217)
您最近一年使用:0次
2024-01-11更新
|
219次组卷
|
2卷引用:青海省2024届高三上学期协作联考数学(理科)试题
解题方法
8 . 已知集合
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be319e2b65cbb888d02d98908da9ffb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b9b470218359a4a47be9244980489e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 设复数
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9e383fb1beaaaeea728c880e93faf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e9c3d509e77d6a7e4874302308c2aba.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . 若实数
满足约束条件
,则
的最小值是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a4aa08de65eac510fb2eac3055214b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d017c225a8d5e732f4f110ad778b477b.png)
您最近一年使用:0次