解题方法
1 . 已知数列
的前
项和为
,
,
,
.
(1)证明:
.
(2)求证数列
为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa01f03fb074bff35b35e07047d11b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66621f8b9a88fb9c05658b9449a5639.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31148cf610ce41888d79538d1dafcb9.png)
(2)求证数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2020-10-08更新
|
222次组卷
|
2卷引用:内蒙古赤峰市宁城县2020-2021学年高三9月摸底考试数学(理)试题
2 . 在数列
中,
,
,且
.
(1)证明:
是等差数列.
(2)求
的通项公式.
(3)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bae03ee4ac75dacfb026290e4207dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3938fc9093a10b040b5ed9d18c876637.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b131b7e61b149cce2c66835b067dd0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e8b1fedcc25007ac7d454e44dfbc44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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昨日更新
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4卷引用:内蒙古名校联盟2023-2024学年高二下学期教学质量检测数学试题
内蒙古名校联盟2023-2024学年高二下学期教学质量检测数学试题内蒙古开鲁县第一中学、和林格尔县第三中学等2023-2024学年高二下学期5月月考数学试题(已下线)高二数学期末模拟试卷02【好题汇编】-备战2023-2024学年高二数学下学期期末真题分类汇编(北师大版2019选择性必修第二册)(已下线)高二数学下学期期末考点大通关真题必刷100题(2) --高二期末考点大串讲(人教B版2019选择性必修第二册)
名校
解题方法
3 . 已知
为数列
的前n项和,满足
,且
成等比数列,当
时,
.
(1)求证:当
时,
成等差数列;
(2)求
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1afae439f6cda00e6b1fcc2bf5363ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874781ab5711bff6ee8c9cbad5b3b3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5d0a73f50b3e4583f1c1b6d6bf0d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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2024-04-24更新
|
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2卷引用:内蒙古赤峰市赤峰二中2023-2024学年高二下学期第一次月考数学试题
名校
解题方法
4 . 在锐角
中,内角
的对边分别是
,且
.
(1)求证:
;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ea9730867a7e5623f023bf5424061d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759ee5f5ca252f6acce1aacea9d17fa6.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb67e12129782b9c98e52b799a24341.png)
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2024-04-10更新
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3卷引用:内蒙古乌海市第十中学2024届高三下学期4月月考文科(一)数学试题
解题方法
5 . 如图,在四面体
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cdda4fb929ecf0957a6f9c2771a956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/39c9236c-d3a5-4aff-a0f7-d231512fd21a.png?resizew=160)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)若
,求四面体
的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cdda4fb929ecf0957a6f9c2771a956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/10/39c9236c-d3a5-4aff-a0f7-d231512fd21a.png?resizew=160)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7613f441a8b5552a178943f8fa1ec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解题方法
6 . 如图,在四棱柱
中,底面
是等腰梯形,
,
,
是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/478f27b0-b873-499b-9bc7-7ec885ac895f.png?resizew=177)
(1)求证:
平面
;
(2)若
平面
,且
,求点
与平面
的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641aa755ada1d83daafc82d5f1fa88db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/478f27b0-b873-499b-9bc7-7ec885ac895f.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afabf56cc68ea438a890f9fea04b708e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22ebcc4aa98d46366df48f751a5f368.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a67521824abc07e3755db95d8f19621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad932128cf5194f46cc8dc30542d56e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bbd32e44f7f14342896c93612d9f4d.png)
您最近一年使用:0次
名校
解题方法
7 . 已知
,且
.
(1)证明:
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7dbc702617c765a573961953cc0901.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec307143b4bf45106369f256a796d61.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c9dd044c24a1c2f7d5b2bce978b450.png)
您最近一年使用:0次
2024-02-23更新
|
433次组卷
|
5卷引用:内蒙古自治区赤峰第四中学2023-2024学年高三下学期开学考试数学(理科)试题
解题方法
8 . 记
为数列
的前
项和,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c835542c6b2e9e9799eb4aa3b832f.png)
(1)求
,并证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661eb98b215405edbdc6434ce55b89cf.png)
(2)若
,求数列
的前
项和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c835542c6b2e9e9799eb4aa3b832f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661eb98b215405edbdc6434ce55b89cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecd783d5199d30ed6cb1b3dacf501c1.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
解题方法
9 . 已知正方体
,棱长为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/426976a0-96a7-453f-8354-c64fd10716e9.png?resizew=160)
(1)求证:
.
(2)若平面
平面
,且平面
与正方体的棱相交,当截面面积最大时,在所给图形上画出截面图形(不必说出画法和理由),并求出截面面积的最大值.
(3)已知平面
平面
,设平面
与正方体的棱
、
、
交于点
、
、
,当截面
的面积最大时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/426976a0-96a7-453f-8354-c64fd10716e9.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/442beba7ef17d73029f5aeff3d944c04.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(3)已知平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95ea5c2c1a7952b03b2b215b9f8c4e7.png)
您最近一年使用:0次
10 . 已知数列
,______.在①数列
的前
项和为
,
;②数列
的前
项之积为
这两个条件中任选一个,补充在上面的问题中并解答(注:如果选择多个条件,按照第一个解答给分.在答题前应说明“我选______”)
(1)求数列
的通项公式;
(2)令
,设数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9e27e378674dbee2a91f2492140c5b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0f6000421c5370e4b89f23be199f388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91870468be4e7e1cbd62092ef7a27f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02e80983b88cdf6b540502816c87d13.png)
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2024-03-21更新
|
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|
3卷引用:内蒙古赤峰市2024届高三下学期3.20模拟考试文科数学试题