名校
1 . 如图,在边长为
的正方形
中,点
是
的中点,点
是
的中点,点
是
上的点,且
.将△AED,△DCF分别沿
,
折起,使
,
两点重合于
,连接
,
.
![](https://img.xkw.com/dksih/QBM/2018/7/16/1989574276603904/1989768106516480/STEM/88df25c0416e4c0fbd0694a6e48537a8.png?resizew=318)
(Ⅰ)求证:
;
(Ⅱ)试判断
与平面
的位置关系,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1df842ffd4121b27c70a8d0b1f78b173.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2018/7/16/1989574276603904/1989768106516480/STEM/88df25c0416e4c0fbd0694a6e48537a8.png?resizew=318)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6969b9971ceae406072933356189a897.png)
(Ⅱ)试判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc704b98f4ed2c7359a7a5b6498b5290.png)
您最近一年使用:0次
2018-07-16更新
|
689次组卷
|
3卷引用:【全国市级联考】四川省攀枝花市2017-2018学年高二下学期期末调研检测数学(理)试题
名校
解题方法
2 . 已知数列
的前
项和为
,满足
,
,数列
满足
,
,且
.
(1)求数列
的通项公式;
(2)求证:数列
是等差数列,求数列
的通项公式;
(3)若
,求数列
的前
项和
。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36749152800d3226346fa4ccfa5bf2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd6c97d2ee3e74ba5730f1cbcc1d43.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f997e6d483c0d0990cb550bbde39fa9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c145ede47d16cc36fa56d2d32ae57c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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
3 . 已知
、
分别是椭圆
的左、右焦点,点
在椭圆
上,且
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/57c2723e-56d2-4ee5-9a89-d710297ac0c1.png?resizew=183)
(1)求椭圆
的方程;
(2)设直线
与椭圆
交于
、
两点,
为坐标原点,
轴上是否存在点
,使得
,若存在,求出
点的坐标;若不存在,请说明理由;
(3)设
为椭圆
上非长轴顶点的任意一点,
为线段
上一点,若
与
的内切圆面积相等,求证:线段
的长度为定值.
![](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/f5f1b14c3d64252d2cb9ff05d30534cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200111b232f1e3525632f1caea6ebf2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb5f2c02230ede5e60c22c5e1a5d3c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/57c2723e-56d2-4ee5-9a89-d710297ac0c1.png?resizew=183)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1393ce18019bb2c27b84bb0d9e7bf59d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31c3d1c2d2c394a71ac2c311653b347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e087c58a497b8d9d8ef1b408001ac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2020-02-09更新
|
478次组卷
|
2卷引用:四川省攀枝花市第三高级中学校2021-2022学年高二上学期第三次月考数学(文)试题
名校
解题方法
4 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8327be2dd861aba12773e281c6f3582.png)
(1)解不等式
;
(2)若对于
,
,有
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8327be2dd861aba12773e281c6f3582.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437bafa929ee61f3e0c641a3dcf3e4ba.png)
(2)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb1c7c4e943918a196ca5efca97f880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8cb1fceb254aa62b6007f8e849c2de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0474aaea4beb448cc01ccf12dad938.png)
您最近一年使用:0次
2020-04-18更新
|
518次组卷
|
10卷引用:2019年11月四川省攀枝花市一模数学(文)试题
2019年11月四川省攀枝花市一模数学(文)试题2019年11月四川省攀枝花市一模数学(理)试题四川省攀枝花市2019-2020学年高三上学期第一次统考理数试题2020届四川省攀枝花市高三第一次统一考试文数试题江西省南昌市四校联盟2019-2020学年高三第二次联考数学(文)试题四川省宜宾市叙州区第一中学校2019-2020学年高二下学期第二次月考数学(文)试题四川省宜宾市叙州区第一中学校2019-2020学年高二下学期第二次月考数学(理)试题四川省泸州市泸县第四中学2020届高三下学期第二次高考适应性考试数学(理)试题四川省泸州市泸县第四中学2020届高三下学期第二次高考适应性考试数学(文)试题(已下线)专题16 不等式选讲-备战2021届高考数学(文)二轮复习题型专练?(通用版)
名校
解题方法
5 . 已知函数
是定义在
上的偶函数,且
.
(Ⅰ)求实数
,
的值;
(Ⅱ)用定义法证明函数
在
上是增函数;
(Ⅲ)解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf73cba44937bc227bed12cf19f12fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249a976e88133f3b3733f09137cf5c42.png)
(Ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(Ⅱ)用定义法证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
(Ⅲ)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aae171be56d79d5ffb98cde789cbcb0.png)
您最近一年使用:0次
2020-02-13更新
|
476次组卷
|
2卷引用:四川省攀枝花市2019-2020学年高一上学期期末数学试题
名校
6 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
;
(2)若
,求二面角
平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ab13ef156d034b710d811e09b0be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87aed767c861502aff771e6b0114746c.png)
您最近一年使用:0次
2019-11-21更新
|
2370次组卷
|
8卷引用:2019年11月四川省攀枝花市一模数学(理)试题
名校
7 . 已知过点
且斜率为
的直线
与圆
:
交于
,
两点.
(1)求斜率
的取值范围;
(2)
为坐标原点,求证:直线
与
的斜率之和为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ed90ebf0061c8a79beed307fc1719a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e383fcc122f267043fbafe0972bfb900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
您最近一年使用:0次
2019-07-29更新
|
3407次组卷
|
8卷引用:四川省攀枝花市第十五中学2019-2020学年高二上学期第一次月考数学文科试题
四川省攀枝花市第十五中学2019-2020学年高二上学期第一次月考数学文科试题四川省攀枝花市第十五中学2019-2020学年高二上学期第一次月考数学理科试卷福建省宁德市2018-2019学年高一下学期期末数学试题安徽省安庆市第一中学2019-2020学年高二上学期期中考试数学(理)试题(已下线)【南昌新东方】江西省南昌市豫章中学2020-2021学年高二上学期10月月考理科数学试题四川省南充市阆中中学2020-2021学年高二上学期期中考试数学(理)试题安徽省蚌埠市固镇二中2020-2021学年高二上学期12月月考理科数学试题湖南省湘潭市第一中学2020-2021学年高二(学考班)上学期期中数学试题
8 . 如图,在以
为顶点的多面体中,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa64539ca44d1385217b4897bef25cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b9b8e52cd788d3a72a6fe6ef20e5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ffb3de83dea6b246028d656483bebc.png)
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/396d0c71-e9bb-4f96-8f15-8f7f9cd03213.png?resizew=174)
(1)请在图中作出平面
,使得
且
,并说明理由;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e63a98f5ed97655875ffb3f9eb413d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa64539ca44d1385217b4897bef25cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76b9b8e52cd788d3a72a6fe6ef20e5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ffb3de83dea6b246028d656483bebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ea9d92e5c258a50af1e461c7388894.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/396d0c71-e9bb-4f96-8f15-8f7f9cd03213.png?resizew=174)
(1)请在图中作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab4c9403b0642d53d8068c63e7f67010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4686e3f93c6ad5b950d1fbb9d4133a93.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b87b3be10408261827291574434d8e.png)
您最近一年使用:0次
名校
9 . 已知椭圆
的离心率为
,椭圆
的四个顶点围成的四边形的面积为
.
(1)求椭圆
的标准方程;
(2)设
为椭圆
的右顶点,过点
且斜率不为0的直线
与椭圆
相交于
,
两点,记直线
,
的斜率分别为
,
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4b10329c2027b8a5827fedfbf214ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
您最近一年使用:0次
2019-07-09更新
|
1696次组卷
|
6卷引用:四川省攀枝花市2018-2019学年高二下学期期末数学(理)试题
10 . 如图,在正三棱柱ABC-A1B1C1,底面△ABC的边长AB=1,侧棱长为
,P是A1B1的中点,E、F、G分别是AC,BC,PC的中点.
![](https://img.xkw.com/dksih/QBM/2019/1/13/2118008030846976/2118564053876736/STEM/221139ce-b766-47b9-b740-b0ee85414aef.png)
(1)求FG与BB1所成角的大小;
(2)求证:平面EFG∥平面ABB1A1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c6fe12d3a9727e00ef87a630302ab.png)
![](https://img.xkw.com/dksih/QBM/2019/1/13/2118008030846976/2118564053876736/STEM/221139ce-b766-47b9-b740-b0ee85414aef.png)
(1)求FG与BB1所成角的大小;
(2)求证:平面EFG∥平面ABB1A1.
您最近一年使用:0次
2019-01-14更新
|
716次组卷
|
3卷引用:四川省攀枝花市第七高级中学校2021-2022学年高三上学期入学考试理科数学试题