1 . 作边长为6的正三角形的内切圆,在这个圆内作内接正三角形,然后再作新三角形的内切圆,如此下去,则前n个内切圆的面积之和为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 已知等差数列
的前
项和为
,且
,
.
(1)求数列
的通项公式;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/a8a0eecb5b800fce9ae10aed86ffee62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5170584604571b5e1afd5ece941e2e73.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7879049ce321d8d486393153f1f28750.png)
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名校
解题方法
3 . 牛顿迭代法是求函数零点近似值的一种方法,它的原理是利用曲线一系列切线与
轴交点的横坐标来逼近函数的零点.已知
,设
,
为
的两个零点(
<
),令
,在点
处作函数
的切线,设切线与
轴的交点为
,继续在点
处作函数
的切线,切线与
轴的交点为
,……如此重复,得到一系列切线,它们与
轴的交点的横坐标形成数列
,易得
(
),设
(
),
的前
项和为
,则下列说法中,正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8167d7170d35d1ec34c58274450cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a34f9d53165bce1f4e5d430ca013c1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a63287530c643a667f401dea61a9955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b6a46c5fb744758ad83902819b83bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/209591cfb9f8271f5ad48d89f214f22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff3f09212ff19257fd0480603af58099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
4 . 已知函数
.
(1)当
时,证明:
有且仅有一个零点.
(2)当
时,
恒成立,求a的取值范围.
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467fb8a741acbbae9548afdc186cd686.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f6313f09d17496008ebe3cc1fca0ca.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ade0e43ca66880fa7a94c2121bfd0df2.png)
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2024-04-23更新
|
1022次组卷
|
4卷引用:云南省昆明市第八中学2023-2024学年高二下学期月考二数学试卷
名校
解题方法
5 . 已知数列
满足
,设
的前
项和为
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6912f44b4a526f8a994ff3ddb5b27dc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2024-04-16更新
|
343次组卷
|
2卷引用:云南省昆明市云南师范大学附属中学2023-2024学年高二下学期教学测评月考(五)数学试题
6 . 已知数列
满足
,且
,
(1)证明:数列
是等比数列;
(2)求出
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4161b24c16bf2d3c2fa3ec173c18d439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe49088cdaf4bfb36acb0cb5bc4104c7.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1052aee3d6061385b17559f4677a8df.png)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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解题方法
7 . 每年6月到9月,昆明大观公园的荷花陆续开放,已知池塘内某种单瓣荷花的花期为3天(第四天完全凋谢),池塘内共有2000个花蕾,第一天有10个花蕾开花,之后每天花蕾开放的数量都是前一天的2倍,则在第几天池塘内开放荷花的数量达到最大( )
A.6 | B.7 | C.8 | D.9 |
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8 . 材料一:有理数都能表示成
,(
,且
,s与t互质)的形式,进而有理数集可以表示为{
且
,s与t互质}.
材料二:我们知道.当
时,可以用一次多项式近似表达指数函数,即
;为提高精确度.可以用更高次的多项式逼近指数函数.
设
对等式两边求导,
得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fff2ffb69cbf301c9efca778fa2636.png)
对比各项系数,可得:
,
,
,…,
;
所以
,取
,有
,
代回原式:
.
材料三:对于公比为
的等比数列
,当
时,数列
的前n项和
.
阅读上述材料,完成以下两个问题:
(1)证明:无限循环小数3.7为有理数;
(2)用反证法证明:e为无理数(e=2.7182^为自然对数底数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537c64844b32a708d299ff92dc53c747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0948ca0227d20b76a27cd1a6d65527fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00957293044aadf33411d25f96a33922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/823ab696d27d40920c39b8c910789380.png)
材料二:我们知道.当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba156ab181b28fa42e7e4596e69c4d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f0237baa1472e643b6654cd8efe601.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860870ed643c19574d5d8b3a01b6afca.png)
得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fff2ffb69cbf301c9efca778fa2636.png)
对比各项系数,可得:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a819b1551fee7d49f197b6c7db77a495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93dfb46889c0485f74277e329d8c5ec8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233ede8e2b7ddd6807e67d974b7370ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8feaae3fe8a0a3504ce8f2daee1d0a50.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51190247f6103b03b31a4f6f01420ddf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7717db429760899f23de4d22702543.png)
代回原式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b4da092e325d22a89c38348dd5bae89.png)
材料三:对于公比为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6520ff48dba646ba8b7a7d7ae7ca35bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a107eb946e0fe41629c644b7628d5cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ecdb961754406f92fceddd4f77cfd3.png)
阅读上述材料,完成以下两个问题:
(1)证明:无限循环小数3.7为有理数;
(2)用反证法证明:e为无理数(e=2.7182^为自然对数底数).
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9 . ①
,②
,③
,
,
成等差,这三个条件中任选两个,补充到下面问题中,并解答本题.
设正项等比数列
的前
项和为
,满足______.
(1)求
;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7289afb8de62d067852999590b00c8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee45219629dd30af171588e646f8b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b9282ce1bc5b01b46bbfe493420c11.png)
设正项等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0496f142d8ae5acb06e83526eaa3ef87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2024-03-03更新
|
1374次组卷
|
3卷引用:云南省昆明市第一中学、银川一中2024届高三下学期联合考试一模数学试卷
10 . 设
,
,
为数列
的前
项和,令
,
,
.
(1)若
,求数列
的前
项和
;
(2)求证:对
,方程
在
上有且仅有一个根;
(3)求证:对
,由(2)中
构成的数列
满足
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4bd34c43fac73d8e57bc4002f85e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90563200461ab26934233cd61865e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52c9237cb0b4acc568d4afb12997186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c68a6521ef0a09c3037d2da838e95a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6d8e87ca6ba04d20ede3136fad5e53.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f714d41279567d6b920d3b85d9ded9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(2)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d12d0bd9afdd4e53ff37f5bfcaa1106c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6200ccb3851c37c8b3d55876ae2b2fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b388148147e0888b0bcf9b7b9c3f96d.png)
(3)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790cebd63e23fad615e39f4277f892f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3282e5fde4ae53fcb1bb072a685304c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24ec1d0b63b66fcd48bf05eb5a25565.png)
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