名校
解题方法
1 . 已知
是等比数列
的前
项的和,且
,
,
成等差数列,求证:
,
,
成等差数列.
![](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/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05201ef79a5d5904f492845396fb5470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48e81b54f78b96294295542b010dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
您最近一年使用:0次
2 . 数列{an}的前n项和为Sn,2Sn=an+1-2n+1+1,n∈N+,且a1,a2+5,19成等差数列.
(1)求a1的值;
(2)证明
为等比数列,并求数列{an}的通项公式;
(3)设bn=log3(an+2n),若对任意的n∈N+,不等式bn(1+n)-λn(bn+2)-6<0恒成立,试求实数λ的取值范围.
(1)求a1的值;
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b1b04112db77069cb75ad66501d564.png)
(3)设bn=log3(an+2n),若对任意的n∈N+,不等式bn(1+n)-λn(bn+2)-6<0恒成立,试求实数λ的取值范围.
您最近一年使用:0次
2020-08-21更新
|
219次组卷
|
10卷引用:四川省三台中学实验学校2017-2018学年高一下学期期末仿真模拟(二)数学试题
四川省三台中学实验学校2017-2018学年高一下学期期末仿真模拟(二)数学试题江西省信丰中学2018-2019学年高二上学期第一次月考数学(理A)试题新疆乌鲁木齐市第七十中学2018-2019学年高一下学期期中考试数学(理)试题山东省济宁市微山县2019-2020学年高二上学期期中数学试题(已下线)专题6.5 高考解答题热点题型---数列的综合应用-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题6.5 高考解答题热点题型---数列的综合应用-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破江苏省连云港市海头高级中学2020-2021学年高二上学期第一次月考数学试题江苏省无锡市江阴市第一中学2020-2021学年高二上学期期中数学试题江苏省苏州市高新区第一中学2021-2022学年高二上学期10月月考数学试题浙江省金华市2022-2023学年高二上学期期中模拟数学试题
名校
解题方法
3 . 设数列
的前
项的和为
,且
,
.
(1)证明数列
为等比数列,并求出数列
的通项公式;
(2)设
,求数列
的前
项的和
;
(3)设函数
(
为常数),且(2)中的
>
对任意的
和
都成立,求实数
的取值范围.
![](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/a79df6b501e8be189ef89bd39c000a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)证明数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f86e5aaea193d51fa06c58abb3898b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275fb9cbc417e30d323d1646dfaad733.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)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c10886e90abefde2a0e8ed77b83237a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-02-28更新
|
187次组卷
|
2卷引用:四川省绵阳市南山中学2017-2018学年高一下学期期中数学试题
名校
4 . 如图,在多面体ABCDEF中,
,
平面ADE,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d744f121ee858da2db4a516ea3f54cf.png)
求证:
.
若
,
,且直线BD与平面ABFE所成
的正切值为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4de68e9fb4e889cde412d984ab94416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce97548f7f4fc80db4ea3fc9a975aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d744f121ee858da2db4a516ea3f54cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ba39e6ae1f6a443e706ed0084ba556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8500aef04522219cdbfdbdb03deeeb8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ad35fbb88406131fc40dc724fdb4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ba5f68a786d297e79aadf02b73cc1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d125c0040bbce7ae8d21a835890701c.png)
![](https://img.xkw.com/dksih/QBM/2018/12/13/2096140627312640/2098677224538112/STEM/9ea6549682ae4bacb78bcc7d99521188.png?resizew=255)
您最近一年使用:0次
2018-12-17更新
|
384次组卷
|
2卷引用:【全国百强校】四川省绵阳中学2018届高三高考三模数学试题(理科)试题
名校
5 . 在平面直角坐标系xOy中,圆O的方程为
,以坐标原点为极点,x轴的正半轴为极轴建立极坐标系,曲线C的极坐标方程是
.
求圆O的参数方程和曲线C的直角坐标方程;
已知M,N是曲线C与x轴的两个交点,点P为圆O上的任意一点,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259e9a874ba8a4fbc027e01699a81d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3118358607a1db468929c2b3f3c1e9d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea57be0e967eaf8e4c29666b82a6ab48.png)
您最近一年使用:0次
2018-12-17更新
|
1026次组卷
|
9卷引用:【全国百强校】四川省绵阳中学2018届高三高考三模数学试题(理科)试题
【全国百强校】四川省绵阳中学2018届高三高考三模数学试题(理科)试题云南省昆明市2018届高三教学质量检查第二次统考理数试题云南省昆明市2018届高三教学质量检查(二统)文科数学试题【全国百强校】宁夏银川市唐徕回民中学2018届高三下学期第四次模拟考数学(理)试题四川省绵阳南山中学2021-2022学年高三上学期12月月考数学(文)试题【全国百强校】河北省武邑中学2019届高三下学期第一次质检数学(理)试题四川省内江市威远中学2020-2021学年高三3月月考数学(文)试题四川省内江市威远中学2020-2021学年高三3月月考数学(理)试题四川省遂宁市射洪中学2021-2022学年高三上学期第四次月考数学文科试题
名校
6 . 如图,在直角梯形
中,
,
是
的中点,将
沿
折起,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/5a88789d-3709-4d98-ac88-bc2251dc6075.png?resizew=284)
(1)若
是
的中点,求证:
平面
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176aa56428b83410a8f4d3a51f36259d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041551b3322c3b2d1479e878cc1460d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37002ada5d194d4d062fa3285d7d9824.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/5a88789d-3709-4d98-ac88-bc2251dc6075.png?resizew=284)
(1)若
![](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/011abe509df00fe9410ab08b585ad7db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
7 . 在三棱柱
中,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
,
,
是线段
上的中点.
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010129394106368/2012968273346560/STEM/f5eadc7aad114e2e9016231639e84a4a.png?resizew=163)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc61a2aa5d8aebe6773d235f31ed81f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce3cec96c4e1314eca67595920d726e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010129394106368/2012968273346560/STEM/f5eadc7aad114e2e9016231639e84a4a.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
8 . 如图,在五面体
中,棱
底面
,
.底面
是菱形,
.
![](https://img.xkw.com/dksih/QBM/2018/4/24/1930738385862656/1933010231033856/STEM/e19e9d5e-f906-4fcf-94e9-c320384578a4.png?resizew=234)
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241f5588d969a876550133324e5ab43c.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/d1529251c3168ad9c4be98bf4b7ce737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e90f9f4e44173888a54c624852064a.png)
![](https://img.xkw.com/dksih/QBM/2018/4/24/1930738385862656/1933010231033856/STEM/e19e9d5e-f906-4fcf-94e9-c320384578a4.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/293612d339efbdc6a2c51e56bbbe6acb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d0fac51cbca54e576cb5199cba43ce2.png)
您最近一年使用:0次
2018-04-27更新
|
870次组卷
|
3卷引用:四川省绵阳市2018届高三第三次诊断性考试数学理试题
解题方法
9 . 如图,在四棱锥
中,侧棱
底面
,底面
是菱形,且
,点
是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/4053add0-375e-4d1b-902c-011445c3c245.png?resizew=158)
(1)求证:直线
平面
;
(2)若
,三棱锥
的体积是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb18c7c5391647214d4da31a88202d2.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/7934e2543304fa29d2cc1ccfbc8daf5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/4053add0-375e-4d1b-902c-011445c3c245.png?resizew=158)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954c584f9c868d235e0fc1debb14428d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f2e778c348154f5b27aa6e074fe45d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b994a51de39375493cf5d7f1827ea9b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71224c66874511b50b84efcbeef1be76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63df78dd883e274ecf7d4017ef5efcdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
您最近一年使用:0次
名校
10 . 已知函数
定义在
上且满足下列两个条件:
①对任意
都有
;
②当
时,有
,
(1)求
,并证明函数
在
上是奇函数;
(2)验证函数
是否满足这些条件;
(3)若
,试求函数
的零点.
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010144098582528/2012989301628928/STEM/456458b0f5aa4cb197c5bc71c11cfffa.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
①对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cbf98e40f2f23810467a5c599ea62c7.png)
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010144098582528/2012989301628928/STEM/06a09e9bc365476f809322aeadd03a5c.png?resizew=147)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01d07f3a82196cabb98a2ab98686eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018857ec6e498113b3b12a730d9313da.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54b6a060d6c51a328341df76013bd89.png)
![](https://img.xkw.com/dksih/QBM/2018/8/14/2010144098582528/2012989301628928/STEM/456458b0f5aa4cb197c5bc71c11cfffa.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
(2)验证函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d44c9fbbc4f7810ba9525fb5d0f577.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9ad855ec3dcb275f2ea1e24fb44919.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2136acdd5edab8c8262b3aafe3babe90.png)
您最近一年使用:0次
2018-08-18更新
|
537次组卷
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7卷引用:四川省三台中学实验学校2017-2018学年高一下学期入学考试数学试题
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