1 . 将杨辉三角中的每一个数
都换成分数
,就得到一个如图所示的分数三角形,称为莱布尼茨三角形,从莱布尼茨三角形可以看出:
,令
,
是
的前n项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb4fb20d3a3a67baa8505623e0bd9de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f2b94b78505bbc9a08ab0b4c3366fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f15150e25e6987b44e131991caa1d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9abb647fd7ac1ee888183e01e554234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
|
您最近一年使用:0次
2 . 定义函数
,其中
表示不小于
的最小整数,如
,
.当
,
时,函数
的值域为
,记集合
中元素的个数为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab342d472fe409e73bee1be8a61774d3.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e56d2f2ee3b7afaa8388bb0fdd806e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3788a125c33eee076151e215a9b02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0411aac4f1f068dc84271315c2e219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70e059359c17ba0f8211a9ed9a28fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3451933e11e7110ff28b4c14c1f8c304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/361386446d504a14471b9fd89130f1c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab342d472fe409e73bee1be8a61774d3.png)
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3 . 在二维空间即平面上点的坐标可用两个有序数组
表示,在三维空间中点的坐标可用三个有序数组
表示,一般地在
维空间中点A的坐标可用n个有序数组
表示,并定义n维空间中两点
,
间的“距离”
.
(1)若
,
,求
;
(2)设集合
.元素个数为2的集合M为
的子集,且满足对于任意
,都存在唯一的
使得
,则称M为“
的优集”.证明:“
的优集”M存在,且M中两不同点的“距离”是7.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b525d8c768efd801ab58bc4c0da9221e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3957b7fdba61064a1d8990d880894678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97de4e0337716e1d89eb1a6cfd7b8335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c6b5e2477070d935260db8c0f4731b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9621fabd914377b322701e2689cc912c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8f111ae47bbcf70999e41743385cdc5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8eaa058fb6ca849782169fc1d94f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4d59b92bf91197446d86893fb9a0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de67567843bcb8dc4cd20f44e1558f9c.png)
(2)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646e73be3272a6edfed21c3ecdc48cb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5b75656c76ce2e9ac0f0c213a6cbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24fd7b7df5b43336d3219f16b3ce6733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f80fced6fa7e6adc72c80228443885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9591c25ee33bd1cb77bb0df04b531fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5b75656c76ce2e9ac0f0c213a6cbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5b75656c76ce2e9ac0f0c213a6cbe9.png)
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4 . 已知数列
为等差数列,
,
,数列
的前
项和为
,且
,
(1)求
的通项公式.
(2)已知
,求数列
的前
项和
.
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0d29f34218cd60cc6e9ce4dcd13925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0876b7e2271371d8a7ea0e77a833a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/f57c3986996a5358b6d3b21e8889d1e8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc869e9868c468b1989ffb6043d782f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7036a7175fe91874f8320c61fc6207de.png)
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2024高三·全国·专题练习
5 . 数列满足
,数列
满足
,数列
的前n项和为
,对任意的
,不等式
恒成立,则实数
的取值范围为
您最近一年使用:0次
名校
解题方法
6 . 将保护区分为面积大小相近的多个区域,用简单随机抽样的方法抽取其中15个区域进行编号,统计抽取到每个区域的某种水源指标
和区域内该植物分布的数量
(
,2,…,15),得到数组
.已知
,
,
.
(1)求样本
(
,2…,15)的相关系数;
(2)假设该植物的寿命为随机变量X(X可取任意正整数).研究人员统计大量数据后发现:对于任意的
,寿命为
的样本在寿命超过k的样本里的数量占比与寿命为1的样本在全体样本中的数量占比相同,均等于0.1,这种现象被称为“几何分布的无记忆性”.
(ⅰ)求
(
)的表达式;
(ⅱ)推导该植物寿命期望
的值.
附:相关系数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de122ae929b1acaff321dec137622ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6449869d4e2736e9ded7e90c25886d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9491bd97166334e901c53cb4dad33bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ea175e26e0d37550bf2b697ac8bf4f.png)
(1)求样本
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
(2)假设该植物的寿命为随机变量X(X可取任意正整数).研究人员统计大量数据后发现:对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7399fcd570d1de4057f2059759d18cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
(ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef133b0fd53a48310a82c18729575abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7399fcd570d1de4057f2059759d18cc9.png)
(ⅱ)推导该植物寿命期望
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)
附:相关系数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5019f565326c6fec3a2494e5955a5bec.png)
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2024-04-01更新
|
1828次组卷
|
3卷引用:湖南省部分学校2024届高三下学期一起考大联考模拟(二)数学试题
7 . 已知数列
和
满足
,
,且
.
(1)求
和
的通项公式;
(2)若
,求数列
的前n项和
;
(3)若对任意的
,
恒成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5991b1f239b66a6c9aad073a04d81e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb33e7173953adcba3940c12c9143299.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3169ba7770ab19eb1e79b9d921fe36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28652e52c0b02a343e618935ea625cbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6868c0aecc8f090457cea76d478551dc.png)
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8 . 约数,又称因数.定义如下:若整数
除以整数
除得的商正好是整数而没有余数,我们就称
为
的倍数,称
为
的约数.设正整数
共有
个正约数,记作
,
,
,
,
.
(1)当
时,若正整数
的
个正约数构成等比数列,请写出一个
的值;
(2)当
时,若
,
,
,
构成等比数列,求
与
满足的关系式(用
和
表示
);
(3)记
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87484a879f450ab097f720fb2a0f4a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c0cd13ec90e5697013e59d73d3e82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5249ec22d8bdb7ffdb8e2e4763d6a1e4.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbd5bb726a08c308b48373afebbb768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeaed9ec21e090defafcfeefe0059c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe164d8a8a4049e01565b576007651de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01416ee1d48b17f889e444b7eda99740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177e4374fb738c4f13dc58e9025c88e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535b55b457cd9ebc8cd3f2f029b59bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b19449c9426801af1da7045cb785ccd.png)
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2024-03-31更新
|
228次组卷
|
2卷引用:四川省成都市树德中学2023-2024学年高二下学期3月阶段性测试数学试卷
名校
解题方法
9 . 已知数列的前
项和为
,
,
.
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9d53c8c47c48a560671ab22f9f0010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)已知数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbe743e6640126a235d574a34267ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7774978b06be986e0d1a3e04ff0ce1a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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10 . 已知正项数列满足
,则( )
A.![]() |
B.![]() |
C.若![]() ![]() ![]() |
D.已知![]() ![]() ![]() |
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