名校
1 . 约数,又称因数.它的定义如下:若整数a除以整数m(
)除得的商正好是整数而没有余数,我们就称a为m的倍数,称m为a的约数.
设正整数a有k个正约数,即为
,
,⋯
,
,(
).
(1)当
时,是否存在
,
,…,
构成等比数列,若存在请写出一个满足条件的正整数a的值,若不存在请说明理由;
(2)当
时,若
,
,⋯
构成等比数列,求正整数a.
(3)当
时,若
,
,…,
是a的所有正约数的一个排列,那么
,
,
,⋯,
是否是另一个正整数的所有正约数的一个排列?并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
设正整数a有k个正约数,即为
![](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/68c0cd13ec90e5697013e59d73d3e82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df21efb81bd9f5ec47c8ad705a2272ad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835c74bbb8c61dd2d2f008664a8c8810.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/5f255d0395fba51ca2d44293cca42e0a.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/177e4374fb738c4f13dc58e9025c88e4.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835c74bbb8c61dd2d2f008664a8c8810.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/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e6f19b84484b5480ea2100165abfd81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9d2e152db0845ff23e4ea0cd00974d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f30fd21924e7bcf368854ef38af82e.png)
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2 . 如图反映了二项式定理产生、完备和推广所走过的漫长历程:
推广到
(m,
).
(2)请你查阅相关资料,细化上述历程中的某段过程,例如从3次到n次,从二项到m项等,说说数学家是如何发现问题和解决问题的.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9216a0f9d6e65ea4937ab7bf102c5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6facad17404e697472ef98719543a995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
(2)请你查阅相关资料,细化上述历程中的某段过程,例如从3次到n次,从二项到m项等,说说数学家是如何发现问题和解决问题的.
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2023-05-24更新
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355次组卷
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4卷引用:人教A版(2019) 选择性必修第三册 新高考名师导学 第六章 6.3 二项式定理
人教A版(2019) 选择性必修第三册 新高考名师导学 第六章 6.3 二项式定理(已下线)6.3 二项式定理(已下线)第三篇 数列、排列与组合 专题8 二项式定理的推广——多项式定理 微点2 多项式定理综合训练人教A版(2019)选择性必修第三册课本习题 习题 6.3
解题方法
3 . 如图,点A在
所在平面外,M,N分别是
和
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/54b9786b-0643-4912-8236-633cf49fda02.png?resizew=137)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/25/54b9786b-0643-4912-8236-633cf49fda02.png?resizew=137)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9948a4eeae82dd50df79cf3c746adf31.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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20-21高一·全国·课后作业
4 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebaf87cdbb21d6c59ff9083645c3c9e.png)
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5 . (1)计算:
;
(2)若复数z满足
,
,求复数
的三角形式.
(3)利用复数证明余弦定理.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f665bf82fe144de1c0c3312435f5af.png)
(2)若复数z满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095e8bf80cfcaadc5b835199f7a41290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7121ef0e8277c5416358f41140a4d048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767bb0023cfd3978108ea8d39ad1f4a3.png)
(3)利用复数证明余弦定理.
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6 . 求证:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150de223d5071642eb5bef75ca64819.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150de223d5071642eb5bef75ca64819.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db78ac6038d4c7d371f923fabe94b96e.png)
您最近一年使用:0次
2021-11-12更新
|
524次组卷
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7卷引用:人教A版(2019) 必修第二册 逆袭之路 第七章 7.3 复数的三角表示2
人教A版(2019) 必修第二册 逆袭之路 第七章 7.3 复数的三角表示2(已下线)12.4 复数的三角形式(已下线)7.3 复数的三角表示人教A版(2019)必修第二册课本习题 习题7.3苏教版(2019)必修第二册课本习题 习题12.4(已下线)7.3.2 复数乘、除运算的三角表示及其几何意义(分层练习)-【上好课】(已下线)7.3复数的三角表示——课堂例题
20-21高一·全国·课后作业
解题方法
7 . 已知三角形的三条中线交于一点
(也称为三角形的重心),且点
将每条中线分为
的两段(如图,
).设
三个顶点分别为
,
,
,求证:
的坐标为
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe103f073845122c66f22dcb14b711f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cce7126782aea7564f4c5e9f3e3c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9fb1a589404b101361fab4a264af920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4adb1a0c5fbcaa7cb61b2febdb7db3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd21e0e1bc3b0764d945795068e45bda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d734c87ef69582d50e4e3f97ccc184.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4dcbbf269a9c3a6cf49f63841c5373.png)
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解题方法
8 . 设非负实数
,
,
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2046bf4297cc13491ec10c59a35b2f75.png)
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解题方法
9 . 已知数列
满足:
,
.
(Ⅰ)证明:数列
为等比数列,并求数列
的通项公式;
(Ⅱ)记
,求使
成立的最大正整数n的值.(其中,符号
表示不超过x的最大整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af8e317162f3c1bb3483b08207ea13.png)
(Ⅰ)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213e22890204937a5dded4436369390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b484a6f707521fb604b8139753d2a6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed2dd4e7c90200f05009bd071b3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
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2021-03-02更新
|
2043次组卷
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7卷引用:浙江省名校协作体2021届高三下学期联考数学试题
浙江省名校协作体2021届高三下学期联考数学试题(已下线)精做02 数列-备战2021年高考数学(文)大题精做(已下线)精做02 数列-备战2021年高考数学(理)大题精做(已下线)专题20 数列综合-2020年高考数学母题题源全揭秘(浙江专版)(已下线)【新东方】高中数学20210429—010【2021】【高三下】(已下线)专题4.3 等比数列-2020-2021学年高二数学同步培优专练(人教A版2019选择性必修第二册)(已下线)第17节 等比数列及前n项和
名校
10 . 已知集合
,若
,记
,
,定义
.
(1)若
且
,写出
中所有满足条件的元素![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)令
,若
,求证:
为偶数;(
表示集合
中元素的个数).
(3)若集合
,且
中的每一个元素均含有4个0和4个1,对任意
,都有
,求
中最多有多少个元素?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e7aebba7f18fef59cdc963c8d337ec8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984c76feb97fd60961042a5a0490042e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafff79fec6e6350a0ed069b3dc6ac98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce5cd26a80b1e5487efcff09a5a4a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddae9bd7702d2dea88db75e8ee9eb45.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80721f50d5063cb9f835ea6fc6870285.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f399034c383bc43ae4341f0a5ce36f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb504fd980b5dc96bb790760ae6319b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34edc4b51e1c44d8d684c8e4fd4bc13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75109fa19b049ee26a088c607e214bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d671185c2cc9c5d88029e04f4b2ccf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e13a814f8e081078dcf3788177affcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f399034c383bc43ae4341f0a5ce36f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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2020-11-20更新
|
162次组卷
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2卷引用:北京市八一学校2020-2021学年高一上学期期中数学试题