解题方法
1 . 如图,棱柱
,侧面
为正方形,在底面
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610717807640576/2611735001669632/STEM/bf05c82c1b8c43e7be2b827f906681b0.png?resizew=170)
(1)求证:
平面
;
(2)线段
上是否存在点
,使
平面
?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a614425dab3c66ab72f2ded51acf2254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679a911235fae7f028966b57f150ddee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4020513c097ba34df4b42e297f892cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5867254f6e74a3e31237279cd481f6.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610717807640576/2611735001669632/STEM/bf05c82c1b8c43e7be2b827f906681b0.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51817ee1ebf17c73ed21171bcfc5b5.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c259ae82d599c5dd81a898acf0c6ff9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4291a7c647aaf6d00e48bed030b48c.png)
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名校
2 . 已知函数
.
(1)当
时,求证:
;
(2)当
时,若不等式
恒成立,求实数
的取值范围;
(3)若
,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41f0a059d02f88033d4c46fbe648ba2.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e2d7a7b5ef6de479ac02b04965245d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a154aa77357cb73cbcd37275d873a324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e2d7a7b5ef6de479ac02b04965245d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9c89d2cd1fb46b1e71ad10227c098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a375205425cf8092535bcc485646fdc3.png)
您最近一年使用:0次
2019-03-30更新
|
1687次组卷
|
8卷引用:江西省九江市第七中学2021届高三上学期期中考试数学(理)试题
3 . 用适当的方法证明下列命题:
(1)
;
(2)设
,求证:三个数中
,
,
至少有一个不小于2.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45597a8f1782f1cdd29b06650b7a5fdf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af36a3b0f5f36d3e70d5af4b2de6bd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2582892eba557b99dbe879efb9754d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7b2877e9e163191cdca767a7ecbb3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f369f9464a202b71aa11872c8e6a1543.png)
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4 . 如图,已知抛物线与坐标轴分别交于A
、B
、C
三点,过坐标原点O的直线
与抛物线交于M、N两点.分别过点C、D
作平行于
轴的直线
、
.(1)求抛物线对应的二次函数的解析式;(2)求证:以ON为直径的圆与直线
相切;(3)求线段MN的长(用
表示),并证明M、N两点到直线
的距离之和等于线段MN的长.
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/4fbddbdfabab4550bfb83c4a46fda115.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/28c38477a2914d08bf56d2768b291972.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/50ae5727b62d4679bdd6542feadbc2ac.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/15a03c0f8234483e834cd3969fb73c58.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/b3bc8f851d394332b24cab8ca34b570e.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/c8e31e3a457f47eda0042ba68a5abd4e.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/02e26592ab7546678bb399f665cd0e99.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/eb5ae2f76bd4437097ad0cc25765eb30.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/02e26592ab7546678bb399f665cd0e99.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/2ba5c2ddc3324d15a776a0334d36274d.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/eb5ae2f76bd4437097ad0cc25765eb30.png)
![](https://img.xkw.com/dksih/QBM/2012/11/9/1571058669568000/1571058675179520/STEM/8073397b2f20477895392153773e3195.png)
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5 . 定义两个
维向量
,
的数量积
,
,记
为
的第k个分量(
且
).如三维向量
,其中
的第2分量
.若由
维向量组成的集合A满足以下三个条件:①集合中含有n个n维向量作为元素;②集合中每个元素的所有分量取0或1;③集合中任意两个元素
,
,满足
(T为常数)且
.则称A为T的完美n维向量集.
(1)求2的完美3维向量集;
(2)判断是否存在完美4维向量集,并说明理由;
(3)若存在A为T的完美n维向量集,求证:A的所有元素的第k分量和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3e014b5001732bc4b37be2b03c4033.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f00efefb7f52ad5c9dbdb180e577ee54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028076d0553b70f0fdae6beff69a10ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8c5d928c389d3abb01ca33fedf17efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00da2c261a6ecd7533ffb8e153eaa506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d9e604bcc449034230149a89d746a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b4b3879d1c6debf0333008f686634e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea687406a05d37d0761cd1a3455c804f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ba4a7e65c27fb359ba7aadd49f797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75cbe607b41f76db6418ce01831a1d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d9e604bcc449034230149a89d746a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdb50eea11f40d9f3c37052c45894a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57aabc9b21bc15ae35720679a7b6d1ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10772b376bc43eb5c33cfd7ba9771657.png)
(1)求2的完美3维向量集;
(2)判断是否存在完美4维向量集,并说明理由;
(3)若存在A为T的完美n维向量集,求证:A的所有元素的第k分量和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/912092af5b5301c659e6e86a7e858f38.png)
您最近一年使用:0次
2024-03-27更新
|
661次组卷
|
3卷引用:2024届江西省九江市二模数学试题
名校
6 . 已知
是等边三角形,点
满足
,
,将△AMN沿MN折起到
的位置,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/febaed40-f8da-48f6-a842-211d89317b9a.png?resizew=303)
(1)求证:
平面MBCN;
(2)在线段
上是否存在点
,使平面
与平面
夹角的余弦值为
?若存在,求
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e14c64680b43f5759399758ac4c1dea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8c37b85e0a70d7927bb3346fe59ef11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7040c2fd8a163d71e35805775feb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d938067915b0d59f491b4c8ee7a982.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/febaed40-f8da-48f6-a842-211d89317b9a.png?resizew=303)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eedf1e774ce129d9a09f02ca1920052.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4459d0d7b4c2e9e8106fe5b4520277e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c932cfbb9fb63159a176a8f45489a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e108d5c61e85e0741ec2c484fc5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6888b2df162e494b6691870ae45c53.png)
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7 . 对于函数
,若
,则称
为
的“不动点”,若
,则称
为
的“稳定点”,函数
的“不动点”和“稳定点”的集合分别记为
和
,即
,
,那么,
(1)求函数
的“稳定点”;
(2)求证:
;
(3)若
,且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f66a2b3d90f0d935d6c8ebaf675349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50eeb6825be5713c9d20584b74ebbd31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/d30bf91f31613ce80bba22a49862db03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fb76793cf9f354f574ad9b881f98a0.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9852d7433cf82fb187fcb796eb6d98d6.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ae8559fedb62797027b7071648a7bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d02e5de0c92487382f4b98376e9740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
8 . 如图
,在
中,
,
于
现将
沿
折叠,使
为直二面角
如图
,
是棱
的中点,连接
、
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/5cd64df1-3cc4-45b4-838b-0c01a40232f2.png?resizew=331)
(1)证明:平面
平面
;
(2)若
,且棱
上有一点
满足
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f4fac08d887c080386bf939bfdb4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470cb205a244f5a455d623e2dd72d622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13af15dbf4a5abd508e8752bf3fd1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f9ad0f53f3813d148f16e532991021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f4fac08d887c080386bf939bfdb4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3701f73add38ffeb06fb42fef55fd533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad217e26bd3580c35998109de14cef73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95226c64f0afdaa10b95ec097a0720ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a043206e1d0f1fc31e4edcb773746941.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/13/5cd64df1-3cc4-45b4-838b-0c01a40232f2.png?resizew=331)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8704811c9c5dba854310ae0de2ba6b05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49cfd630472bc73bd8c2209376dbe9d1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd270aed68cec28a22dff1cf891d8f7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91c2bb8c4f212a03496a8661deb2eb53.png)
您最近一年使用:0次
名校
9 . 已知函数 ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd66879c7d7c41c4119ac9571a90342.png)
(1)讨论
的单调性.
(2)证明:当
时, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0de742522bdf16fedb2765f379029a4.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd66879c7d7c41c4119ac9571a90342.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23fb90e09994fdc6ab02ed6ba664f31f.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c472109d36ba3e37771845ac86f714a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0de742522bdf16fedb2765f379029a4.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d985495cdfb142edece75f11da70b3da.png)
您最近一年使用:0次
2024-03-12更新
|
1119次组卷
|
5卷引用:江西省九江市同文中学多校联考2024届高三下学期3月月考数学试题
解题方法
10 . 设
,
为椭圆
的左、右两个焦点,
为椭圆上一点,且
,
.
(1)求
的值;
(2)若直线
:
与椭圆
交于
,
两点,线段
的垂直平分线经过点
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed221e4955e7b39e7245c3ecd0080c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2dfb22c6f1c155747100e7536cd1abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271fb7c2a4bb1d9655e992696ba05eb6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5464dc3bd349a216296fbaa879ae47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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