名校
1 . 阿基米德螺线广泛存在于自然界中,具有重要作用. 如图,在平面直角坐标系
中,螺线与坐标轴依次交于点
,
,
,
,
,
,
,
,并按这样的规律继续下去. 给出下列四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3ca3380b-545e-4e3b-b76e-8ce7a38b2295.png?resizew=214)
①对于任意正整数
,
;
②存在正整数
,
为整数;
③存在正整数
,三角形
的面积为
;
④对于任意正整数
,三角形
为锐角三角形.
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17584c9b8f4e48c3a8e0a7c8ac626d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920e36afc62923f2dda82631490fc547.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ac934c7b049be27290784a9478c82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1511466ac46376133963f9276381a83b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118c102d0a174e5521ec58a2c357bb7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefa8b3307f16206f2792bfe611e034d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e1334862f58291d998975c5f571c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098eaf2a270d549f7e292d199c8b2906.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3ca3380b-545e-4e3b-b76e-8ce7a38b2295.png?resizew=214)
①对于任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e611ea48a878cd03f800b0a6cbd982d.png)
②存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5d6940ef122dcb071e361c7161c82b.png)
③存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64a12f4337c1ce6236b9b2aae324b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01dd350dc95f42f1883e0cc7aae084.png)
④对于任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad64a12f4337c1ce6236b9b2aae324b3.png)
其中所有正确结论的序号是
您最近一年使用:0次
名校
2 . 已知
是
的直径,M是圆上不同于A、B的任意一点,
、
的斜率分别为
、
,则
(∵
)
类比到椭圆中,
是过椭圆
(
)中心的弦,M是椭圆上不同于A、B的任意一点,
、
的斜率分别为
、
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6438d0e12b0606fa901265403de43df4.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3503d330608e7138d1b529aba4512fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546a035918f025942ca99b9ffebd8eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd6a1d6fab318824426e52464a575e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4581644268c6ad0c86efc46b95b165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada25f76504c3fd1226da43c94cb4277.png)
类比到椭圆中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/546a035918f025942ca99b9ffebd8eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd6a1d6fab318824426e52464a575e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6438d0e12b0606fa901265403de43df4.png)
您最近一年使用:0次
2021-11-23更新
|
839次组卷
|
3卷引用:黑龙江省哈尔滨市第六中学2021-2022学年高三上学期期末考试数学(文)试题
3 . 观察如图所示的三角形数阵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814397354c2ae1cb08e0271305970811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feda926749de04fa585f73f84c568f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
根据规律可得该数阵第
行第
个数为______ ,第
行各个数之和为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814397354c2ae1cb08e0271305970811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d0b71b8d2c183154221f717ce09077b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b184c94e38f1e5dbe750b2168c2a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feda926749de04fa585f73f84c568f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
根据规律可得该数阵第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
您最近一年使用:0次
4 . (Ⅰ)计算求值:
;
(Ⅱ)用数学归纳法证明:
.(参考数值:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a689b7b5a7d92a73baf9215a4b55dc.png)
(Ⅱ)用数学归纳法证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccd7ad7bf84011b9e3ee760b4f72575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b6c0ab0959ef9dc2e37bb7a8c8fcf9e.png)
您最近一年使用:0次
5 . 在坐标平面内横纵坐标均为整数的点称为格点.现有一只蚂蚁从坐标平面的原点
出发,按如下线路沿顺时针方向爬过格点:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295492fc0519118488a5efabdf2afd7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cf6590154c8e47b658762dbc7f8dba.png)
,则蚂蚁在爬行过程中经过的第114个格点
的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295492fc0519118488a5efabdf2afd7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cf6590154c8e47b658762dbc7f8dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa7f738951fee6021e5b3a77160436d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7965779f786d8ca67f42800c566d0d83.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763481566658560/2777724325150720/STEM/48c235567a6a436390587cc5f9ea101e.png?resizew=199)
您最近一年使用:0次
2021-08-02更新
|
165次组卷
|
2卷引用:安徽省黄山市2020-2021学年高二下学期期末文科数学试题
6 . (1)已知等差数列
中,首项
,公差
.求证:对任意正整数
,
,
,
都不成等差数列;
(2)已知
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b753c8ac2884e125fd3f3f4bfc56bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ce64685821c3e55c07f151996ca8c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7e761be88728b3db50c2abd4377c12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d06c4de60ad6a35764da233bd35c9a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192e541a4964ded591ba25ea3284827d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a204c74f3b77e2ea203554481a54fed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa75bafd5db4c6b73126dacea72322d.png)
您最近一年使用:0次
7 . 我们知道,当
时,可以得到不等式
,当
时,可以得到不等式
,由此可以推广:当
时,其中
,
,得到的不等式是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323f4e181b418a66cc36d75e0f8da126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9656db3a38e6c58dc5ceb291173053a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716a875b4267775efb0e70be292652d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fc8abc6b4b71a0fc30ec4f5679f2e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
您最近一年使用:0次
2021-07-09更新
|
195次组卷
|
4卷引用:河南省信阳市2020-2021学年高二下学期期末数学(理)试题
解题方法
8 . 请用二项式定理解决下列问题:
(1)求
除以100的余数?
(2)已知
,请比较
与
的大小,并证明你的结论.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bce704393f7b0081a14c656e54dd95.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ddcb15eb419ed659536e1385b09af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ceef1abeeef220b4fe5f7d96feedd90.png)
您最近一年使用:0次
9 . 如果空间凸多面体的顶点数为
,棱数为
,面数为
,那么
,这个定理是由瑞士数学家欧拉在1752年提出的,该定理提供了拓扑变换的不变量而发展了拓扑学,被称为拓扑学的欧拉定理或欧拉公式.1996年诺贝尔化学奖授予对发现
有重大贡献的三位科学家,
是由60个
原子构成的分子,它是形如足球的多面体,这个多面体有60个顶点,以每一个顶点为端点都有三条棱,面的形状只有五边形和六边形,则
分子中六边形的个数为( )
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729390336933888/2749793871511552/STEM/ad83c4951dd14bab87b4fa6737f6a352.png?resizew=101)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c91c4472879d107d42da5b07fab777e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1e1951b21dc3273a0e0d80ff04f0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1e1951b21dc3273a0e0d80ff04f0e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1e1951b21dc3273a0e0d80ff04f0e0.png)
![](https://img.xkw.com/dksih/QBM/2021/5/26/2729390336933888/2749793871511552/STEM/ad83c4951dd14bab87b4fa6737f6a352.png?resizew=101)
A.12 | B.16 | C.18 | D.20 |
您最近一年使用:0次
2021-07-01更新
|
461次组卷
|
5卷引用:福建省福州金山中学2021-2022学年高一下学期期末考试数学试题
解题方法
10 . 开普勒说:“我珍视类比胜过任何别的东西,它是我最可信赖的老师,它能揭示自然界的秘密,”波利亚也曾说过:“类比是一个伟大的引路人,求解立体几何问题往往有赖于平面几何中的类比问题.”在选修1—2第二章《推理与证明》的学习中,我们知道,平面图形很多可以推广到空间中去,例如正三角形可以推广到正四面体,圆可以推广到球,平行四边形可以推广到平行六面体等.如图,如果四面体
中棱
,
,
两两垂直,那么称四面体
为直角四面体.请类比直角三角形
(
表示斜边上的高)中的性质给出直角四面体
中的两个性质,并给出证明.
![](https://img.xkw.com/dksih/QBM/2021/6/17/2744873475547136/2748343588134912/STEM/165b547f6ead4a82b50c3e0c4fd0adc8.png?resizew=352)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d674cc434aa1a626840c340c7dcdc96a.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/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d674cc434aa1a626840c340c7dcdc96a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d674cc434aa1a626840c340c7dcdc96a.png)
![](https://img.xkw.com/dksih/QBM/2021/6/17/2744873475547136/2748343588134912/STEM/165b547f6ead4a82b50c3e0c4fd0adc8.png?resizew=352)
直角三角形![]() | 直角四面体![]() | |
条件 | ![]() | ![]() ![]() ![]() |
结论1 | ![]() | |
结论2 | ![]() |
您最近一年使用:0次