解题方法
1 . 如图,在三棱锥
中,
,
,
,
为等边三角形,
,点E,F分别是线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/7/8cf34016-31a0-4250-846b-242424c32069.png?resizew=141)
(1)证明:
平面
;
(2)求点C到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78192b9e9d4e38175e840233749443bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32f01c4faacedfe56f5127d6c0cc63cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215cc9bd1c9de016812d95c36450a9ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/6/7/8cf34016-31a0-4250-846b-242424c32069.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求点C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
7日内更新
|
403次组卷
|
3卷引用:河南省周口市鹿邑县第二高级中学校2023-2024学年高一下学期月考测试(三)(6月)数学试题
河南省周口市鹿邑县第二高级中学校2023-2024学年高一下学期月考测试(三)(6月)数学试题河南省洛阳市强基联盟2023-2024学年高一下学期5月联考数学试题(已下线)专题08 立体几何大题常考题型归类-期末考点大串讲(人教B版2019必修第四册)
名校
解题方法
2 . 已知首项不为1的正项数列
,其前n项和为
,且点
在直线
上.
(1)求数列
的通项公式;
(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/a3240d85b7afa2658cc8a6c2b007b427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0138d1c1aef8123c18084fe3567ee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2024-06-01更新
|
1146次组卷
|
2卷引用:河南省周口市沈丘县第二高级中学2024届高三考前模拟(三)数学试题
名校
解题方法
3 . 在矩形
中,
,
为边
上的中点.将
沿
翻折,使得点
到点
的位置,且满足平面
平面
,连接
,
,
.
平面
.
(2)在线段
上是否存在点
,使得二面角
的余弦值为
?若存在,求出
点位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a7f89fd7ddc3277cf27230a12d60f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a595401d3a63911df54858576fb17bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2024-05-31更新
|
744次组卷
|
2卷引用:河南省周口市沈丘县第二高级中学2024届高三考前模拟(三)数学试题
解题方法
4 . 某商家为举办抽奖活动,准备了
个相同的盒子,里面均装有n张形状完全相同的卡片,一部分卡片为写有“谢谢惠顾”的无效卡,另一部分卡片为写有“100元”的代金券,第
个盒子中有k张代金券,
张无效卡.现将这些盒子混合,任选1个盒子,并且依次从中不放回地取出2张卡片,若第二次取出无效卡的概率不超过
,则n的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953a57ebc83ec97a0ad667269c93684b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795da436610505275a05cdb45a1b7ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3c977e5f46b4bfb63779c047b149d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
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5 . 如图,直线
与函数
的图象的三个相邻的交点分别为A,B,C,其横坐标分别为
,
,
,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2add8fc3f5d751209f9e1a5856016351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c97938d07092ac2803ff89a47e5b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0189322d31e9b630ab0c0df14aa030a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d6c00cb2047fdede2e5a46d83a6a411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8c844349ea010f733d7a816c67619d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
6 . 设
,
,则下列计算正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046387911745f43ff3b6804ea58eb26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e2f737b178cbb55087c193ce845159.png)
A.![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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7 . 甲和乙两个箱子中各装有
个大小、质地均相同的小球,并且各箱中
是红球,
是白球.
(1)当
时,从甲箱中随机抽出2个球,求2个球的颜色不同的概率.
(2)由概率学知识可知,当总量
足够多而抽出的个体足够少时,超几何分布近似为二项分布.现从甲箱中不放回地取3个小球,恰有2个白球的概率记作
;从乙箱中有放回地取3个小球,恰有2个白球的概率记作
.那么当
至少为多少时,我们可以在误差不超过
(即
)的前提下认为超几何分布近似为二项分布?(参考数据:
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33adb74906403b0b00fcbd9fa691d8b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcc133d5b11b33a904875182d8c8261.png)
(2)由概率学知识可知,当总量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042e234d538bc2c789d7c5a314f1ca92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8ad1462305b4399657e139e7e3053f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be80dfcf339d34d2b419818023574db.png)
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解题方法
8 . 已知圆台的上、下底面的直径分别为8和4,若p为“圆台的体积不大于
”,则p的充分不必要条件可以为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55745e8c0d66f8831495fbc4de4d4bc2.png)
A.圆台的母线长为![]() | B.圆台的母线长为![]() |
C.圆台的母线长为![]() | D.圆台的母线长为![]() |
您最近一年使用:0次
9 . 已知
,
,圆
上存在点P,使得
,则a的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fadc9a19de13ca7688ca93f0c70a8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb7bbd15ddf2ac840cc08ad8492a0164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88cf40220cccba8b7c85817f6936b727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b768ea6a05cbf45b28fc46c501ba532.png)
A.![]() | B.![]() | C.3 | D.4 |
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10 . 已知双曲线
过点
,
.
(1)求双曲线C的渐近线方程.
(2)若过双曲线C上的动点
作一条切线l,证明:直线l的方程为
.
(3)若双曲线C在动点Q处的切线交C的两条渐近线于A,B两点,O为坐标原点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d520ab5ab59d374c898428c27ba46e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
(1)求双曲线C的渐近线方程.
(2)若过双曲线C上的动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf0d139c9810361b4971904a943856b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7555cd38f338e8758f5f73e10c08dc0a.png)
(3)若双曲线C在动点Q处的切线交C的两条渐近线于A,B两点,O为坐标原点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
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