1 . 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)
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2 . 把正整数按一定的规则排成了如图所示的三角形数阵,设
(
,
)是位于这个三角形数阵中从上往下数第
行,从左往右数第
列的数,若
,则
与
的值分别为( )
![](https://img.xkw.com/dksih/QBM/2021/9/25/2815785353912320/2816188245090304/STEM/a15749c230b741bc95db630ede64c6d3.png?resizew=224)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a14c188b1c9d61aa237b137ba18023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a85359bb803e1d526b2618a2aaf54e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d7d9dd26c9feab447266456e8a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://img.xkw.com/dksih/QBM/2021/9/25/2815785353912320/2816188245090304/STEM/a15749c230b741bc95db630ede64c6d3.png?resizew=224)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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3 . 十字绣有着悠久的历史,如下图,(1)、(2)、(3)、(4)为十字绣最简单的四个图案,这些图案都是由小正方形构成,小正方形数越多刺绣越漂亮.现按同样的规律刺绣(小正方形的摆放规律相同),设第
个图案包含
个小正方形.
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699618743894016/2807301644681216/STEM/df78ec29-e3b3-4cca-a0ac-79c6443c5b9f.png?resizew=426)
(1)写出
的值;
(2)利用合情推理的“归纳推理思想”,归纳出
与
之间的关系式,并根据你得到的关系式求出
的表达式;
(3)求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
![](https://img.xkw.com/dksih/QBM/2021/4/14/2699618743894016/2807301644681216/STEM/df78ec29-e3b3-4cca-a0ac-79c6443c5b9f.png?resizew=426)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc5119887c500b60dd3f3975068a363.png)
(2)利用合情推理的“归纳推理思想”,归纳出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d81d4730668cce0bbeb1f8fd39e0b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2073b63a627bd213f2f5a660b8e07983.png)
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4卷引用:宁夏银川市长庆高级中学2020-2021学年高二上学期期末考试数学(理)试题
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4 . 设数列
满足
,
.
(1)计算
,
,猜想
的通项公式并加以证明;
(2)令
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc05128e2ba4bb8e4e38a5ebfdacfbd.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b434249d65b74686942c2040523c9b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2299170644a75632b5ec5656532a9520.png)
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3卷引用:辽宁省沈阳市东北育才学校2020-2021学年高二下学期期末数学试题
辽宁省沈阳市东北育才学校2020-2021学年高二下学期期末数学试题(已下线)4.4 数学归纳法(课堂培优)-2021-2022学年高二数学课后培优练(苏教版2019选择性必修第一册)江西省赣州市赣县第三中学2021-2022学年高二3月月考数学(理)试题
名校
5 . 已知
,
,
,…,若
,则正整数n的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc7287f2979cee29b07b4376e491c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d580850d3b90c78578e6ff348b3fcca4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fedb7c8d5edeb48927968ae5e45edc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61445bdba47047c94f6a1662b8815d3d.png)
A.4 | B.3 | C.5 | D.6 |
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3卷引用:江西省九江市修水县2020-2021学年高二下学期期末数学(文)试题
6 . 某同学在一次研究性学习中发现,以下四个式子的值都等于同一个常数:
①
;②
;③
;④
.
(1)试从上述式子中选择一个,求出这个常数;
(2)根据(1)的计算结果,将该同学的发现推广为三角恒等式,并证明你的结论.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d279d9f25f3917667c42a4f1e5eaa9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe0472de91bab2fbf3a06212c3829361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb82f6e8e5c8638add14e9a004918ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83af203eb16184ce04dcfff294274538.png)
(1)试从上述式子中选择一个,求出这个常数;
(2)根据(1)的计算结果,将该同学的发现推广为三角恒等式,并证明你的结论.
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7 . 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)
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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
名校
8 . 二维空间中,圆的一维测度(周长)
,二维测度(面积)
,三维空间中,球的二维测度(表面积)
,三维测度(体积)
应用合情推理,若四维空间中,
特级球”的三维测度
,则其四维测度
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8469d348cd31a3a1429e0828954d6164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50390afd2cf9ed105ad1f9e1873d7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68159e318b99528a6e641f9b8804ec8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f7c2b9cb9c08a25bbdd7c0e4bdff48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420619830fd8100cd81a42597cb7cbbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f0c38d83113af52b14095c052a44fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4db8437c6d4376b55bdceed535b0bb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:河南省南阳市2020-2021学年高二下学期期末数学(理科) 试题
9 . 观察下列各式:
,
,
,
,……,则下列各数的末四位数字为8125的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94eef5c23ca2c4254152b804ec9243e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff01a0558f409ca533973aff718b2a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae05f3a35308132c0537eae3023bc1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62e1fc63be8817cb1ef30cefc78d5c6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
10 . 在平面直角坐标系中,横纵坐标都是整数的点称为“整点”,现部分整点按如下规律排成一列:
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,…,则第666个整点是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa482d7bcaa385bfc3548b42a4bfb60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29343388ca8b33dc98325e65382b38a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad20e2bc6576fc461419f8f138d26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c3a2f5b0702ea9fbb9dc8904579737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1a65d88f9823d49da8f3b96ea9ec6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86022205a7487439dd8d0897cd3bf19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481d24e2af1e0cd348732b9444d1dde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ed24bfcc37b79fe9ca61ed8fdf26ea.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-08-01更新
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2卷引用:云南省保山市2020-2021学年高二下学期期末数学(理)试题