名校
解题方法
1 . 如图,已知
平面
,
为矩形,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/cfcb4474-ac28-4ea8-88fb-9cb5c734d479.png?resizew=156)
(1)证明:
;
(2)若
,求证:平面
平面
.
![](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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fbb19cb4eb2d7f3207559eb07355ba2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/cfcb4474-ac28-4ea8-88fb-9cb5c734d479.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479d987bc7abd828c64f9dc745836ab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0498b9374bee2169d323c3bd8d2d23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09cae065ec545de896871ff619390438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
2022-12-20更新
|
289次组卷
|
3卷引用:吉林省四平市第一高级中学2019-2020学年高二上学期第一次月考数学(理)试卷
名校
解题方法
2 . 已知数列
中,
,其前
项的和为
,且满足
(
).
(1)求证:数列
是等差数列;
(2)证明:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/a3b39498579d2e0678bd204d9e4afc6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad83668ff336589f82a2cd04db9f9947.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35fb3cd13fb42176132a19326959c82.png)
您最近一年使用:0次
2020-10-03更新
|
826次组卷
|
13卷引用:2015届吉林省长春市普通高中高三质量监测三理科数学试卷
2015届吉林省长春市普通高中高三质量监测三理科数学试卷2015-2016学年吉林省扶余市一中高二上学期期末考试理科数学试卷2015届湖北省襄阳市五中高三5月模拟考试一文科数学试卷2016届陕西省西安市一中高三下学期第一次模拟文科数学试卷2016-2017学年辽宁庄河高中高二10月考文数试卷2018年高考数学(文科)二轮复习 精练:大题-每日一题规范练-第二周河南省六市2018届高三第一次联考(一模)数学(理)试题【全国百强校】宁夏回族自治区银川一中2018届高三第三次模拟考试数学(理)试题【全国百强校】四川省南充高级中学2018届高三考前模拟考试数学(理科)试题(已下线)专题32 数列大题解题模板-2021年高考一轮数学(文)单元复习一遍过(已下线)专题32 数列大题解题模板-2021年高考一轮数学单元复习一遍过(新高考地区专用)2023版 苏教版(2019) 选修第一册 名师精选卷 第十单元 等差数列 B卷湖南师范大学附属中学2022-2023学年高三上学期月考(六)数学试题
3 . 用综合法或分析法证明:
(1)如果
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0da537e5284dc9786845fca39a9ca913.png)
(2)求证
.
(1)如果
![](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/0da537e5284dc9786845fca39a9ca913.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c19d94ff48082c1cd213c82c99abf0.png)
您最近一年使用:0次
2020-08-17更新
|
384次组卷
|
3卷引用:湖北省黄冈市黄梅国际育才高级中学2018-2019学年高二下学期3月月考数学(文)试题
4 . 用分析法证明命题“已知
求证:
”最后要具备的等式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e7d3c17c5cc1f7e6d2be555ec8043c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55400dc679817933f98c1d8ced0ff34f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 如图,在直角梯形
中,
,
,
,
,
,点
在
上,且
,将
沿
折起,使得平面
平面
(如图),
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/272baebc-ff8b-4f4c-b334-3e84383a11ee.png?resizew=330)
(1)求证:
平面
;
(2)在线段
上是否存在点
,使得
平面
?若存在,求
的值,并加以证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40560ea08d6cd8c1d4d9661ee6faaa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/272baebc-ff8b-4f4c-b334-3e84383a11ee.png?resizew=330)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cf187bc2ede965870b90757b495f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5d46cc6946821619e937d12d30dc83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747978ec67fee6ee9eb07d02b80987d7.png)
您最近一年使用:0次
2019-10-30更新
|
714次组卷
|
3卷引用:吉林省延边二中2019-2020学年高一上学期12月月考数学试题
名校
解题方法
6 . 如图,在三棱柱
中,
平面
,
,
在线段
上,
,
.
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877300960157696/1878762482581504/STEM/79f5e4f79f464a11a1a4511872c511e9.png?resizew=170)
(1)求证:
;
(2)试探究:在
上是否存在点
,满足
平面
,若存在,请指出点
的位置,并给出证明;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1579e28325da0406c0e26e53145817.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177f0adc6666014e717ef2381ea27fb7.png)
![](https://img.xkw.com/dksih/QBM/2018/2/7/1877300960157696/1878762482581504/STEM/79f5e4f79f464a11a1a4511872c511e9.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55171d348ce35d913d70b7fddacf168.png)
(2)试探究:在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
2018-02-09更新
|
298次组卷
|
2卷引用:吉林省伊通满族自治县第三中学校等2017-2018学年高一上学期期末联考数学试题
名校
7 . 已知△
中,
,求证
.
证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7efa75e1f580910d41d954bc911cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0caa3e6a0de075df4c9a869dfed4bf20.png)
画线部分是演绎推理的( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c0ad68bf0ca0d00461a269df127af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7efa75e1f580910d41d954bc911cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0caa3e6a0de075df4c9a869dfed4bf20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf1aa83a61bd003e09b68d51af984a4.png)
A.大前提 | B.三段论 | C.结论 | D.小前提 |
您最近一年使用:0次
2017-07-15更新
|
217次组卷
|
3卷引用:吉林省扶余市第一中学2016-2017学年高二下学期期末考试数学(文)试题
名校
8 . 如图,在平面四边形
中,
,
,
,
,
.
(1)证明:设
、
的面积分别为
,求证:
;
(2)求
和
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d719799bcc3d752881d6a049785de689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aedf65d7d930fdb972d4802c0dea8b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6651d5001a305f6cd288804425afa174.png)
(1)证明:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd13ef233bdd904044123a5baa201d3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/20/dcdc4120-fd75-4a16-9b3a-bfdb49e42ee3.png?resizew=149)
您最近一年使用:0次
2017-07-26更新
|
35次组卷
|
2卷引用:吉林省吉林大学附属中学2017届高三第六次摸底考试数学(文)试题
名校
解题方法
9 . 如图,在四棱锥
中,
为正三角形,平面
平面
,
//
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220515209068544/2220763683184640/STEM/0ad9b1c0afd04d89bce4301d90237f4b.png?resizew=118)
(1)求证:平面
平面
.
(2)求三棱锥
的体积.
(3)在棱
上是否存在点
,使得
//平面
?若存在,请确定点
的位置,并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43dfede0d7e17c2ad89ab51349e6bf0.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220515209068544/2220763683184640/STEM/0ad9b1c0afd04d89bce4301d90237f4b.png?resizew=118)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2017-08-07更新
|
1421次组卷
|
5卷引用:吉林省长春市九台区第四中学2019-2020学年高一上学期期末测试数学试卷
解题方法
10 . 已知函数
.
(1)求
的最大值;
(2)设
,
是曲线
的一条切线,证明:曲线
上的任意一点都不可能在直线
的上方;
(3)求证:
(其中
为自然对数的底数,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374f4dc3c1593925bcffe29045d50ae6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93188bc211eaaf5a1decd4d194fae6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c54498daef39c262bb1fb6004d1f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
您最近一年使用:0次