名校
解题方法
1 . 将正三角形(1)的每条边三等分,并以中间的那一条线段为底边向外作正三角形,然后去掉底边,得到图(2);将图(2)的每条边三等分,并以中间的那一条线段为底边向外作正三角形,然后去掉底边,得到图(3);如此类推,将图(
)的每条边三等分,并以中间的那一条线段为底边向外作三角形,然后去掉底边,得到图
.上述作图过程不断的进行下去,得到的曲线就是美丽的雪花曲线.若图(1)中正三角形的边长为1,则图(
)的周长为__________ ,图(
)的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/cc4bbbc0-a228-404d-981c-94e842b746b2.png?resizew=216)
您最近一年使用:0次
2021-08-09更新
|
1073次组卷
|
6卷引用:山东省邹平市第一中学2021-2022学年高三上学期模拟新高考一卷数学试题
名校
解题方法
2 . 已知矩形
,其中
,
,点D沿着对角线
进行翻折,形成三棱锥
,如图所示,则下列说法正确的是__________ (填写序号即可).
①点D在翻折过程中存在
的情况;
②三棱锥
可以四个面都是直角三角形;
③点D在翻折过程中,三棱锥
的表面积不变;
④点D在翻折过程中,三棱锥
的外接球的体积不变.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
①点D在翻折过程中存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9aabd9a42a97a1108149fafca8a919.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
③点D在翻折过程中,三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
④点D在翻折过程中,三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c586b72a984e1fd9082b9f02ef7f3e91.png)
您最近一年使用:0次
2024-06-10更新
|
459次组卷
|
2卷引用:黑龙江省2024届高三信息押题卷(四)数学试卷
名校
3 . 设
,对任意的实数
,记函数
(
表示
中的较小者).若方程
恰有5个不同的实根,则满足题意的条件可能为___________ .(填写所有符合题意的条件的序号)
①
;
②
或
;
③
;
④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911fc7eab7f260fe061957ee9b548fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0898d7174604fa223558cb25b4c78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e133bf93b2fe08afaa8f96ce919de0f6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fbe82295863faba6876c7b13d05ddb.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26492a3f9e0ea6f661d177330b83de72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d86b4ad722d7b720603eba9d330fd1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad03d15ddcafb8abe3b8ac0520a88053.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe3d09f0ec653a57568fbd7ed5fc585.png)
您最近一年使用:0次
2024-04-24更新
|
296次组卷
|
2卷引用:陕西省安康市高新中学、安康中学高新分校2023-2024学年高三阶段性测试(八)理科数学试题
4 . (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
|
1403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月模拟数学试题江苏省无锡市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)
解题方法
5 . 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:江西省赣州市2023届高三摸底考试数学(理)试题
名校
6 . 如图,多面体ABCDEF中,面ABCD为正方形,DE⊥平面ABCD,CF∥DE,且AB=DE=2,CF=1,G为棱BC的中点,H为棱DE上的动点,有下列结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/937a6588-9605-4bea-902b-55f620847fd2.png?resizew=175)
①当H为DE的中点时,GH∥平面ABE;
②存在点H,使得GH⊥AE;
③三棱锥B−GHF的体积为定值;
④三棱锥E−BCF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://img.xkw.com/dksih/QBM/editorImg/2022/12/23/937a6588-9605-4bea-902b-55f620847fd2.png?resizew=175)
①当H为DE的中点时,GH∥平面ABE;
②存在点H,使得GH⊥AE;
③三棱锥B−GHF的体积为定值;
④三棱锥E−BCF的外接球的表面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705a1b850cb8031e4a90b143bb999d8b.png)
其中正确的结论序号为
您最近一年使用:0次
2022-04-08更新
|
2619次组卷
|
9卷引用:东北三省三校2022届高三第二次联合模拟考试数学(理科)试题
东北三省三校2022届高三第二次联合模拟考试数学(理科)试题湖北省武汉市硚口区2022届高三下学期5月训练数学试题山西省山西大学附属中学校2022届高三三模(总第七次模块)理科数学试题(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(理)三轮冲刺过关(已下线)第11练 空间直线、平面的平行-2022年【暑假分层作业】高一数学(人教A版2019必修第二册)湖南省长沙市长郡中学2023届高三上学期第三次月考数学试题辽宁省协作校2022-2023学年高二上学期期中考试数学试题湖南省怀化市湖天中学2022-2023学年高三上学期11月月考数学试题辽宁省鞍山市岫岩满族自治县2022-2023学年高二上学期期中数学试题
名校
7 . 如图,矩形
中,
,
为边
的中点,将
沿直线
翻折至
的位置.若
为线段
的中点,在
翻折过程中(
平面
),给出以下结论:
①三棱锥
体积最大值为
;
②直线
平面
;
③直线
与
所成角为定值;
④存在
,使
.
则其中正确结论的序号为_________ .(填写所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.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/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8588e18e27bfebf7c81c7e3c7efb1149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb79f948d408ab4fb6708bde172c5e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b9f96b8ecc3cb000bb2f030809f225.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce1b066f8869d0ff4513f7a99745125.png)
④存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
则其中正确结论的序号为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/db8c3c80-3639-479e-8ae4-e7aeaef6394b.png?resizew=239)
您最近一年使用:0次
2022-07-01更新
|
1376次组卷
|
5卷引用:北京市海淀区2023届高三一模数学试题查漏补缺练习
8 . 已知函数
的定义域为
,其导函数为
,且满足
,
,若
,且
.给出以下不等式:
①
;
②
;
③
;
④
.
其中正确的有___________ .(填写所有正确的不等式的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c9eca1510647f9b40cf7ce69c3757f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d3e854c20afcc64563d73509d7fec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf81a4a39b4e2df4d05dc3b2fcc28150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d900314efb0e4cacb6e5de945b5397.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9dfcf14375629c84b688a2676dcba1.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4240b3f95b81bb26488fedff54637634.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa3106f981611b33e2872f5967ffec.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceccfc629ea5bb0d51036eb22fd2ec14.png)
其中正确的有
您最近一年使用:0次
2021-04-04更新
|
904次组卷
|
4卷引用:河南省安阳市2021届高三二模数学(理)试题
名校
9 . 数列
满足
,
,实数
为常数,①数列
有可能为常数列;②
时,数列
为等差数列;③若
,则
;④
时,数列
递减;则以上判断正确的有______ (填写序号即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fedcf01e8f41a2610d182c32538a3ada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e25fd655fccad3f351a4a59a4ac7b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d69fa853794ba03bf379140ecccf59c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2020-05-25更新
|
486次组卷
|
3卷引用:2020届湖北省荆州市沙市中学高三下学期5月第三次模拟数学(理)试题
10 . 已知函数
若方程
有且只有五个根,分别为
,
,
,
,
(设
),则下列命题正确的是_____________ (填写所有正确命题的序号).
①
;②存在k使得
,
,
,
,
成等差数列;
③当
时,
;④当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a696b23bf6556ef55eeeff5379080ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc6d0827a159050e3fa55164f258b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9b42973c53907f09f2de384c42fc5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4acd5e05f89802149b8b810c24d6ac73.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59d678b4c4aa0ec2bb04be1b2739a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9b42973c53907f09f2de384c42fc5f.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a4eaa80b44625890339d6a0065c241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779bc714193033c738599c30487bd42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c12f6211f669ab04f4fe1c1b279ac2e.png)
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