1 . 在各项都为正数的等比数列
中,
,
(1)求数列
的通项公式:
(2)记
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8777b8d6f2132b9875d8ad68ce415560.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd0f044dc82a12fd1c71872f2ac12d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2024-03-29更新
|
1014次组卷
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3卷引用:河南省周口恒大中学2023-2024学年高二下学期第一次月考数学试卷
河南省周口恒大中学2023-2024学年高二下学期第一次月考数学试卷陕西省西安市周至县第六中学2023-2024学年高二上学期1月期末考试数学试题(已下线)5.3.2 等比数列的前n项和(3知识点+8题型+强化训练)-【帮课堂】2023-2024学年高二数学同步学与练(人教B版2019选择性必修第三册)
2 . 已知函数
为奇函数,且
的最小正周期是
.
(1)求
的解析式;
(2)当
时,求满足方程
的
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd4174797f46c3f9b4fe43ad2ef77857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffd1f6bd3686a07efa4086a02b96a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13354a8198830ebf4199df5ea318298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
名校
解题方法
3 . 某学校组织知识竞赛,题库中试题分
,
两种类型,每个学生选择2题作答,第1题从
,
两种试题中随机选择一题作答,学生若答对第1题,则第2题选择同一种试题作答的概率为
,若答错第1题,则第2题选择同一种试题作答的概率为
.已知学生甲答对
种试题的概率均为
,答对
种试题的概率均为
,且每道试题答对与否相互独立.
(1)求学生甲2题均选择
种试题作答的概率;
(2)若学生甲第1题选择
种试题作答,记学生甲答对的试题数为
,求
的分布列与期望.
![](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/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)求学生甲2题均选择
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若学生甲第1题选择
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
您最近一年使用:0次
2024-03-10更新
|
813次组卷
|
4卷引用:河南省部分名校2024届高三上学期期末检测数学试题
河南省部分名校2024届高三上学期期末检测数学试题河北省部分重点高中2023-2024学年高三上学期2月期末考试数学试题(已下线)艺体生新高考新结构全真模拟3(已下线)7.3.1离散型随机变量的均值(分层练习,6大题型)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)
4 . 如图,在正三棱柱
中,D,E分别为棱
的中点,
在棱
上,且EF
平面
.
(1)求
的值;
(2)若
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e79a03b1084cb2e8f8ac00329fe98544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/126fd3df-55c0-470f-8355-d5096437a597.png?resizew=138)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c8ae2f62d6a56f0ad6104814e73e50.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bff3ccea5989c60e51e321af3f53f54.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在
中,
,
,
.将
绕
旋转
得到
,
分别为线段
的中点.
到平面
的距离;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984b80660410b1d9a3bd0f607c01f924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e671ec69011d5d368791070e722d832b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3877c5dd48bc7311f79a38de74a6cab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18e1963fd5895e9aef6263dbc153727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415440adb63f3bc728ae315b5d77ce4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
您最近一年使用:0次
2024-03-07更新
|
405次组卷
|
5卷引用:河南省信阳高级中学2023-2024学年高二下学期3月考前测试(A)数学试题
名校
解题方法
6 . 如图,正方体
的棱长为
分别为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/478dce1e-1612-4f04-96c4-020d8b8e0da0.png?resizew=161)
(1)请在正方体的表面完整作出过点
的截面,并写出作图过程;(不用证明)
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b684d2e78a0eb1b406913f2730e1d226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5307e04a84a0621e4d5bd2aaa1980ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/478dce1e-1612-4f04-96c4-020d8b8e0da0.png?resizew=161)
(1)请在正方体的表面完整作出过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6f5c5097e8b1f6c46b744ea1630d41e.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378daab67e7e1d1542e6e25f0f259185.png)
您最近一年使用:0次
2024-03-07更新
|
500次组卷
|
4卷引用:河南省九师联盟2024届高三上学期2月开学考试数学试卷
河南省九师联盟2024届高三上学期2月开学考试数学试卷甘肃省部分学校2024届高三下学期2月开学考试数学试题(已下线)重难点6-2 空间几何体的交线与截面问题(8题型+满分技巧+限时检测)内蒙古自治区赤峰市松山外国语学校2024届高三下学期开学考试数学(理)试题
解题方法
7 . (1)已知
,
,且
,求
的最大值;
(2)已知正数
,
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536178538dd8176b8743e3ceb94523a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)已知正数
![](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/f6ec15c2be441b5ccdee4e40537c4c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6f3c30a6691c86db14441bd51d777d.png)
您最近一年使用:0次
2024-03-07更新
|
307次组卷
|
3卷引用:河南省洛阳市2023-2024学年高一上学期1月期末数学试题
8 . 已知P是抛物线
的准线上任意一点,过点P作抛物线C的两条切线
,切点分别为
.
(1)若点P纵坐标为0,求此时抛物线C的切线方程;
(2)设直线
的斜率分别为
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)若点P纵坐标为0,求此时抛物线C的切线方程;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
您最近一年使用:0次
9 . 如图,
和
所在平面互相垂直,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/a5135f69-83b4-4c65-be60-ca2e18259675.png?resizew=170)
(1)求证:
;
(2)求平面
和平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca76d0d2614f113bcd4c9e134b95123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d33b11489be0d7f7ec786fb04907c3c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/5/a5135f69-83b4-4c65-be60-ca2e18259675.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
您最近一年使用:0次
名校
解题方法
10 . 设a,b,c分别为
内角A,B,C的对边,已知
,
.
(1)求A的值;
(2)若
,
,求c的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621f0f565c473d7f14a912acd2191e66.png)
(1)求A的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d253dd9af597ae29b98628f185eb447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0786732df29e599cd67cd69e5a1a5f.png)
您最近一年使用:0次
2024-03-03更新
|
548次组卷
|
4卷引用:河南省新乡市原阳县第一高级中学2023-2024学年高一下学期4月月考数学试题