名校
解题方法
1 . 已知椭圆
:
的离心率为
,且过左焦点和上顶点的直线
与圆
相切.
(1)求椭圆
的方程;
(2)若直线
:
与椭圆
交于
,
两点,
为坐标原点,且直线
,
,
的斜率之和为0.求三角形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ca318bbcddecc7d4125d871b00bc52.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c88ad1b01a260d8c065ab59e1999be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
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名校
2 . 如图,四棱柱
中,四边形
为矩形,且平面
平面
,
,
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922734306738176/2927423329067008/STEM/74b21ec5-9053-4db3-8ad8-5fe272f5f12d.png?resizew=203)
(1)证明:
平面
;
(2)求
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ebcc4aa98d46366df48f751a5f368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f67c2d29909f744a60448e409f0fbab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04415900de76e34c2d45431f4569382.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2324805c5dfe2a35787bc3af840586ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922734306738176/2927423329067008/STEM/74b21ec5-9053-4db3-8ad8-5fe272f5f12d.png?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9881fa5ebb7a73ee0f744df6baceb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
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名校
解题方法
3 . 在东京奥运会中,甲,乙、丙三名跳水运动员参加小组赛,已知甲晋级的概率为
,乙、丙晋级的概率均为
,且三人是否晋级相互对立.
(1)若甲晋级的概率与乙、丙两人均没有晋级的概率相等,与乙、丙两人有且仅有一人晋级的概率也相等,求
,
;
(2)若
,记三个人中晋级的人数为
,若
时的概率和
时的概率相等,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d9b426bcc34a2cca2184dc1310f5e4.png)
(1)若甲晋级的概率与乙、丙两人均没有晋级的概率相等,与乙、丙两人有且仅有一人晋级的概率也相等,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1317f8d562994833f26f0a2638cf19cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3244144d5cf0158ba408618be015d03f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a123f4954cc3e526fd05619f64616b7.png)
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山西省吕梁市2022届高三下学期开年摸底联考(全国卷1)数学(理)试题百师联盟(山东省新高考卷)2021-2022学年高三下学期开年摸底联考数学试题湖南省百师联盟2021-2022学年高三下学期开年摸底联考数学试题百师联盟2022届高三下学期2月开年摸底联考全国卷1理科数学试题黑龙江省尚志市尚志中学2021-2022学年高二下学期期中考试数学试题(已下线)专题21 概率与成对数据的统计分析(模拟练)(已下线)第7章 概率初步(续)(基础、常考)分类专项训练-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
名校
解题方法
4 . 在三角形ABC中,内角A,B,C的对边分别为a,b,c,
,且
.
(1)求角C;
(2)E为三角形ABC所在平面内的一点,
,且
,求线段CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b104867a12d24a353d94858c2fa17c8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3334cbe3605a831bcebe5128e55d007.png)
(1)求角C;
(2)E为三角形ABC所在平面内的一点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66640d345a9263a5ea72c832823f080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2927cf6696d508fbd20d46e5a263bdc.png)
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名校
解题方法
5 . 已知函数
的图象上存在点
使得
(
为自然对数的底数),则实数
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e313317c7a0ce5f5cd01a6991af81563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43db00e106c7d08a76a7ba71ca5e63d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35017079ef171ba7cb5878e02ade2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
6 . 如图,在三棱锥
中,
平面
,
,
,若三棱锥的外接球体积为
,则异面直线
与
所成角为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa2eb9837d18069575f16397d175a6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2022/2/23/2922734306738176/2927423328845824/STEM/f749b26c8fc34425ba0d340e7cca83f8.png?resizew=173)
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5卷引用:山西省吕梁市2022届高三下学期开年摸底联考(全国卷1)数学(理)试题
山西省吕梁市2022届高三下学期开年摸底联考(全国卷1)数学(理)试题百师联盟(山东省新高考卷)2021-2022学年高三下学期开年摸底联考数学试题湖南省百师联盟2021-2022学年高三下学期开年摸底联考数学试题百师联盟2022届高三下学期2月开年摸底联考全国卷1理科数学试题(已下线)押新高考第16题 空间几何体-备战2022年高考数学临考题号押题(新高考专用)
7 . 小明用某款手机性能测试app对10部不同品牌的手机的某项性能进行测试,所得的分数按从小到大的顺序(相等数据相邻排列)排列为:81,84,84,87,x,y,93,95,97,99,已知总体的中位数为90,若要使该总体的标准差最小,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5113986d9507fc5015e71989831c128b.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5113986d9507fc5015e71989831c128b.png)
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山西省吕梁市2022届高三下学期开年摸底联考(全国卷1)数学(理)试题百师联盟2022届高三下学期2月开年摸底联考全国卷1理科数学试题(已下线)专题03 均值不等式及其应用(针对训练)-2023年高考数学一轮复习精讲精练宝典(新高考专用)(已下线)第九章统计(知识通关)(2)【单元测试卷】2022-2023学年高一数学分层训练AB卷(人教A版2019必修第二册)
名校
解题方法
8 . 已知实数
,
满足约束条件
,设
,则
最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc18cb064aeb8cd671fa53af69b490cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1995404eb114809bc18fbdb4f1388b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
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解题方法
9 . 已知数列
中,
,
,当数列
的前
项和取得最大值时,
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ea518c5f92e0cb508f33494d3a5671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9341800e8673e94a44577f816109029f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d99792b5a0f044a8d23b10eac63d5f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.53 | B.49 | C.49或53 | D.49或51 |
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解题方法
10 . 已知直线
:
与抛物线
:
交于
,
两点,点A,B在准线上的射影分别为点
,
,若四边形
的面积为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2348e2bbfb3ab494d0476dcd68b3effb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7452ddb20286551f2d4ba3e7a76bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
A.2 | B.4 | C.![]() | D.![]() |
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