名校
1 . 如图,在四棱锥
中,
平面
,四边形
是矩形,
,过棱
的中点E作
于点
,连接
.
;
(2)若
,求平面
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7b9bf7332256ac478041957fa2a55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77a38df73ce8b2b83f8361e0af8d507.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea14cf7efd7abd3f362281bae728b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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2024-06-13更新
|
1192次组卷
|
3卷引用:重庆市主城区2024届高三下学期学业质量调研抽测(第二次)数学试题
名校
解题方法
2 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61216b6344288c75bbb110804eec3678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7efe6aaaf70b93b22d82877fdc23808b.png)
A.![]() | B.1 | C.![]() | D.![]() |
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2024-06-12更新
|
815次组卷
|
3卷引用:重庆市永川北山中学校2024届高三下学期高考预测卷(最后一套)数学试题
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3 . 甲、乙两名运动员在一次射击训练中各射靶20次,命中环数的频率分布条形图如下.设甲、乙命中环数的众数分别为
,
,方差分别为
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a4f716d800822e017b2df61bd45051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e17eb813c10c1cc21d29f85a1006f6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef3ebd68a5d7ae49db6d5dee9ec11b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618202e9960c59b604a5c2cbc510bcb1.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2024-06-12更新
|
1196次组卷
|
4卷引用:重庆市开州中学2023-2024学年高三下学期高考模拟考试数学试题(四)
名校
解题方法
4 . 已知
,若实数m,n满足
,则
的最小值为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e74a6ed0b5422459d019ffeb752158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de3aec7dea25bff9b87f12fe41a8e6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c9cceb3285ab068493b820d03effa7.png)
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2024-06-11更新
|
543次组卷
|
2卷引用:重庆市名校联盟2023-2024学年高三下学期全真模拟考试数学试题
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解题方法
5 . (1)证明:当
时,
;
(2)已知正项数列
满足
.
(i)证明:数列
为递增数列;
(ii)证明:若
,则对任意正整数
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca947e8ea00b7a485097ecafd2dfcae9.png)
(2)已知正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f91f8b7476e67db488d85c3a14ffa6d.png)
(i)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496f142d8ae5acb06e83526eaa3ef87.png)
(ii)证明:若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90f2db682457da2d4abd0e7cca1bdf40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d8a310323506a3c2f3626dec8d781f.png)
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6 . 已知方程
的两个复数根分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f397b1e5a55fd4688c479c97c16f45c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d860cb86e1467ac24010aecfc7a425.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-06-11更新
|
177次组卷
|
2卷引用:重庆市巴蜀中学校2024届高三下学期模拟预测数学试卷
名校
7 . 已知抛物线
的焦点为
,其准线与
轴的交点为
,过点
的直线
与抛物线
交于
,
两点(
点位于
点右方).若
为
的角平分线,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff24d4627c643c5aeee873c6e1e626aa.png)
__________ ;直线
的斜率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4fb72e39d79b7a0cd892fa5fa34bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed24d7acba0b3a7ebf4d520296424a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff24d4627c643c5aeee873c6e1e626aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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8 . 已知函数
图象的一个对称中心为
,且
在
上单调递增,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629ab2b9cf61f4b02419beb7754767a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b212e0d4339cbd3d236a807547ebf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed440b9f974492068a68203e5029f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
您最近一年使用:0次
2024-06-11更新
|
159次组卷
|
2卷引用:重庆市巴蜀中学校2024届高三下学期模拟预测数学试卷
9 . 已知椭圆
的离心率为
,点
在
上.
(1)求椭圆
的方程;
(2)过点
的直线
交椭圆
于
两点(异于点
),过点
作
轴的垂线与直线
交于点
,设直线
的斜率分别为
.证明:
(i)
为定值;
(ii)直线
过线段
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f2a72c6d7780757ab065fb29f47526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5671fb25040a712a49e8c8148d67d300.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
(i)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
(ii)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1ec05e3cec27677ded7b4aecaa62d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
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解题方法
10 . 已知实数
满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4edfef181ed229ed1a3bb2295be7db9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次