名校
解题方法
1 . 设P为多面体M的一个顶点,定义多面体M在点P处的离散曲率为
,其中
为多面体M的所有与点P相邻的顶点,且平面
,平面
,…,平面
和平面
为多面体M的所有以P为公共点的面.已知在直四棱柱
中,底面ABCD为菱形,
.
①直四棱柱
在其各顶点处的离散曲率都相等;
②若
,则直四棱柱
在顶点A处的离散曲率为
;
③若
,则直四棱柱
在顶点A处的离散曲率为
;
④若四面体
在点
处的离散曲率为
,则
平面
.
上述说法正确的有______ (填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275fc582ec511e4c5a2a98f69da0cdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e0c2c9eaed87ff47d9637e00c04c3af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183f3fdb3204864ff2f60c8c1dac2f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db59863ffec5fa450ab8342fd8675c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d7f18c3c9dae7e6d4f2e96281289f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733e19f18ab01a3c022331805ed58a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
①直四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
④若四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7bdd603c88ddd439925239ac74d5461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc0f4e88a98b2b25320e4bed691342b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
上述说法正确的有
您最近一年使用:0次
2 . 如图,多面体
中,面
为正方形,
平面
,且
为棱
的中点,
为棱
上的动点,有下列结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/48778c19-a59b-4356-84b1-99f6bdb831c1.png?resizew=155)
①当
为
的中点时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
平面
;
②存在点
,使得
;
③直线
与
所成角的余弦值的最小值为
;
④三棱锥
的外接球的表面积为
.
其中正确的结论序号为___________ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4d527ecb502d8fd02ebd37a28b1922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d7774116cf1c014ba4d7b2ff43a3fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/48778c19-a59b-4356-84b1-99f6bdb831c1.png?resizew=155)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3f8b5c2dba20d42a8c551cd75a38fe.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98ee8ce2c56dccae6b63b5a9ca022b8.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26712d1a7a5864cd18498f16f7bd96c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e95a79288fcb7e47fba4410722e2bc6.png)
其中正确的结论序号为
您最近一年使用:0次
3 . 在某网店购买之前未曾使用过的商品时,先翻看该商品的相关评价.从统计角度来看,这也是一种抽样调查,这种抽样调查______ .(填写“具有代表性”“不具有代表性”)请说明理由.
您最近一年使用:0次
2023高二·全国·专题练习
4 . 多项式
中
的系数为__ .(用数字填写答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a585bc9eaab00bd855b84371942aae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
您最近一年使用:0次
解题方法
5 . 如图,在直三棱柱
中,
是边长为2的正三角形,
,M为
的中点,P为线段
上的动点(不包含端点),则下列说法正确的是_______ (填写序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/b087a148-6eac-4bcf-a3fa-2e2f1ce0ee07.png?resizew=148)
①
平面
②三棱锥
的体积的取值范围为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b474a46c225534a0a9732bc76606e.png)
③
与
为异面直线 ④存在点P,使得
与
垂直
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/b087a148-6eac-4bcf-a3fa-2e2f1ce0ee07.png?resizew=148)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f36f074d1dc1054c679236ec70dcaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790c0a17ee2d7181ee95da741694bd1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550b474a46c225534a0a9732bc76606e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
2022-04-01更新
|
730次组卷
|
5卷引用:百师联盟2022届高三二轮复习联考(一)(全国卷)文科数学试题
百师联盟2022届高三二轮复习联考(一)(全国卷)文科数学试题(已下线)查补易混易错点06 立体几何-【查漏补缺】2022年高考数学(文)三轮冲刺过关广东省东莞市东莞外国语学校2021-2022学年高一下学期期中数学试题(已下线)专题15 立体几何(模拟练)-1(已下线)核心考点05简单几何体的表面积与体积-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)
名校
6 . 已知
,关于该函数有下面四个说法,
①
的最小正周期为
;
②
在
上单调递增
③当
时,
的取值范围为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82443820d05fb94887d41bc09f02b0e6.png)
④
的图象可由
的图象向右平移
个单位长度得到
其中正确的是______ (填写序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddddfd6956a8400c6b5649ada8edc435.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c9af1bc5ff872a96651a35f47330da.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e670a46456df1a78e6f7ac39cd94fd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82443820d05fb94887d41bc09f02b0e6.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df9f3b6523fdd4ae00bd425105bf766.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e24f048f9a87274863ba2c037d7a5c.png)
其中正确的是
您最近一年使用:0次
解题方法
7 . 已知函数
,
的定义域均为
,且
,
.若
的图象关于直线
对称,且
,有四个结论①
;②4为
的周期;③
的图象关于
对称;④
,正确的是______ (填写题号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde99b1c6e97508d5047f24db5671116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac5a567601c3ec9b3ef63a80b546536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a431537df789febf4bc45e3dc23cefaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed57d79c717fc8cf7ede3d9995c98359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619dfe49a03c16d3417af006fb252d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ffa04830a54771969954847ce4f0f6.png)
您最近一年使用:0次
2023-03-09更新
|
639次组卷
|
3卷引用:专题02函数与导数(选择填空题1)
名校
8 . 如图,多面体
中,底面
为正方形,
平面
,且
,G为棱
的中点,H为棱
上的动点,有下列结论:
![](https://img.xkw.com/dksih/QBM/2023/3/4/3187265005854720/3189632691404800/STEM/812260ab23e3487898813c9999c89add.png?resizew=147)
①当H为
的中点时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
平面
;
②三棱锥
的体积为定值;
③三棱锥
的外接球的表面积为
.
其中正确的结论序号为______ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6db4765699190f823a4b79a898d9dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef319a6b6527b65dd91c98a590989a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2023/3/4/3187265005854720/3189632691404800/STEM/812260ab23e3487898813c9999c89add.png?resizew=147)
①当H为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93240c1473e10c736cc33b65053de761.png)
③三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/199098479c92e87304b91871172d46e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02dba908a505cff93e0b297d00b82a40.png)
其中正确的结论序号为
您最近一年使用:0次
9 . (1)若数列
的通项公式为
,则该数列中的最小项的值为__________ .
(2)若
的展开式中含有常数项,则n的最小值等于__________ .
(3)如图所示的数阵中,用
表示第m行的第n个数,则以此规律
为__________ .
(4)
的内角A、B、C所对的边分别为a、b、c.已知
,且
,有下列结论:①
;②
;③
,
时,
的面积为
;④当
时,
为钝角三角形.其中正确的是__________
填写所有正确结论的编号
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22363774130b5db04c49b36bc4d58001.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbdb3fc9614438947c7f1537ec64765.png)
(3)如图所示的数阵中,用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a66c5f00b5b38a2d052354b5611970e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01a9aa3e38f912969450d2a1fe5ffcae.png)
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931802799407104/2938048186130432/STEM/b7d18d9015bb45d3a6959a5b0edfd3df.png?resizew=208)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a37dbc8484f51a3d2a25a509838d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef1e7984a935eb4ac5730ccea966af4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18dccba7bc301e4913b1a4856afae466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d697d914ec99d6edb5a6ab7efe1c5686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a15a13b4190ac3d5feaee27a4c97b21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adac343f5a716a1959eb0abbcdac0bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530be0354ac54e554421d9c82e5070e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58303bdbbdf9b78308135ee1ed413d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a301324443eb93b467134a86890dd9ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
您最近一年使用:0次
2022-03-17更新
|
1402次组卷
|
4卷引用:湖北省武汉市武昌区2022届高三下学期3月模拟数学试题
湖北省武汉市武昌区2022届高三下学期3月模拟数学试题(已下线)考点25 二项式定理及其应用(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)(已下线)考点09 解三角形-1-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)江苏省无锡市2022届高三下学期3月模拟数学试题
名校
10 .
的展开式中,
的系数是________________ .(用数字填写答案)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065447a2fb8d8b1fa4f4f23c1e04cc76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
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2022-09-25更新
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4卷引用:陕西省安康市2018届高三下学期第三次教学质量联考理科数学试题