解题方法
1 . 已知
是常数,在数列
中,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94ae936f82425aadd82bfbc76079d2a.png)
(1)若
,求
的值;
(2)若
=4,证明:数列
是等比数列,并求数列
的通项公式;
(3)在(2)的条件下,设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94ae936f82425aadd82bfbc76079d2a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)在(2)的条件下,设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1302abaebc9df026c2a83291063e83b4.png)
您最近一年使用:0次
2 . 已知数列
中,
,
,
.
(1)求
的值;
(2)证明:数列
是等差数列;
(3)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1928c254cfada1f75a5cd1e34db5a63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf6c01c4c6c5a42d5e73e2cdf5b01c23.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6d1a2ba5d54a31af8b9aef15b44731.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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解题方法
3 . 已知:如图,四棱锥
,
平面
,四边形
是平行四边形,
为
中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/296b77e3-04a0-4935-9c6b-08257295f362.png?resizew=161)
(1)求证:
平面
;
(2)求证:
.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbab4a3f9636fe3eeee75ba79d08a52.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/296b77e3-04a0-4935-9c6b-08257295f362.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999d4fbcbe15f78c29d518f25d317c2.png)
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解题方法
4 . 如图,四棱锥
的底面是边长为1的正方形,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/ff2240d1-63f0-43e5-bd1c-a53a34b3fef4.png?resizew=143)
(1)求四棱锥
的体积;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608671c3fb2cf5e852e8cbad3681e16b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/ff2240d1-63f0-43e5-bd1c-a53a34b3fef4.png?resizew=143)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5000fea066102e62cf2128ccbbd2b3e3.png)
您最近一年使用:0次
2023-03-17更新
|
1346次组卷
|
3卷引用:云南省2022-2023学年高二上学期期末普通高中学业水平考试数学试题
解题方法
5 . 如图,在三棱锥中P-ABC,PA
底面ABC,AB
AC,E、F分别是BC、PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/1096d365-f77d-482f-9218-a22873362c03.png?resizew=158)
(1)证明:
平面
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/1096d365-f77d-482f-9218-a22873362c03.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
您最近一年使用:0次
解题方法
6 . 如图所示,已知AB⊥平面BCD ,BC⊥CD,M,N分别是AC,AD的中点.
(1)求证: MN//平面BCD;
(2)求证: CD⊥平面ABC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/f23d6bb1-5c02-4190-a3c2-cad232f36969.png?resizew=133)
(1)求证: MN//平面BCD;
(2)求证: CD⊥平面ABC.
您最近一年使用:0次
解题方法
7 . 如图所示,四棱锥
的底面
是平行四边形,
为PA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/3c5264a5-b146-40fe-ae26-964252c12b09.png?resizew=230)
(1)求证:PC
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)若
底面
,且
,
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/3c5264a5-b146-40fe-ae26-964252c12b09.png?resizew=230)
(1)求证:PC
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)若
![](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/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b11ca0cc9a775ae01fcf593cb0d3283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,点P为菱形ABCD所在平面外一点,PA⊥平面ABCD ,点E为PA的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/aeffbcef-be98-4d1f-800d-5437ed4896a7.png?resizew=215)
(1)求证: PC//平面BDE;
(2)求证: BD⊥平面PAC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/22/aeffbcef-be98-4d1f-800d-5437ed4896a7.png?resizew=215)
(1)求证: PC//平面BDE;
(2)求证: BD⊥平面PAC.
您最近一年使用:0次
2020-04-17更新
|
1497次组卷
|
3卷引用:云南省2019-2020学年1月普通高中学业水平考试数学试题
9 . 已知数列
是等差数列,
,
.
(1)求
;
(2)若数列
满足
,
,
.
①设
,求证:数列
是等比数列;
②求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfd6b761451716ba3d7130c93497ea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675aee12a0f2b2350d184a193f5cc09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd7aedb05165a366fe03cd5c0f31fcbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
②求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
10 . 如图所示,
是
的直径,点
在
上,
是
所在平面外一点,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/98f5d190-c78a-4c43-9db4-498bc51dc440.png?resizew=192)
(1).求证:
平面
;
(2).若
是边长为6的正三角形,
,且
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/98f5d190-c78a-4c43-9db4-498bc51dc440.png?resizew=192)
(1).求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748d9b9948485c5ba87ca8751c6e053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2).若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90da62f1614568a0b1e5e47ea85e7e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e749d4e67d0a2dcb44829c79dd58c22.png)
您最近一年使用:0次
2020-03-13更新
|
1929次组卷
|
6卷引用:2018年1月云南省普通高中学业水平考试数学试卷