1 . 等差数列
的前
项和为
,
(
且
),
.
(1)求
的通项公式与前
项和
;
(2)记
,当
,
时,试比较
与
的大小;
(3)若
,正项等比数列
中,首项
,数列
是公比为4的等比数列
,且
,求
的通项公式与
.
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fab51121848ce166035ceab6f4e00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3c9f09e932ad3cc1f3720d93b34c56.png)
(1)求
![](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)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1dcf4e0dd72f254d9eab961b892ae9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15520cf5be7c2685975aac51bc99ac4f.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385275d29d8c8a7841eaeaa3dfab2cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7afef6271af7462ffa935a1846e3ec90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ba85f74cda4ddd621278e558bc036f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ee3a47bf7dfe538ae367cc006a69b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea2efac902bfb513a224c40faef2516.png)
您最近一年使用:0次
2 . 已知数列
是正项等比数列,
是等差数列,且
,
(1)求数列
和
的通项公式;
(2)
,求数列
的前
项和.
(3)
表示不超过
的最大整数,
表示数列
的前
项和,集合
共有4个元素,求
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/51d1eecd0ba6347401e36612efcf0005.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adeec5eaea5f88f69d96dd0c54ccd305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ef48976a52cc4a2be7c46a98426c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba903eeaf0719775fe0de71949f643f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b17a9b9bb8bf6bb9865e37f204da5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4b73c9f0ec3ad00e5a535e7678185b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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3 . 已知集合
,定义:当
时,把集合
中所有的数从小到大排列成数列
,数列
的前
项和为
.例如:
时,
,
.
(1)写出
,并求
;
(2)判断88是否为数列
中的项.若是,求出是第几项;若不是,请说明理由;
(3)若2024是数列
中的某一项
,求
及
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc6c83969f0c67473049709952b50e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d47710bdf547780bc9c29c42423cce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8bd390fa43014ff48549a6ca941d38c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2046390ed7657e860458b026a4ced115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ac0dba37b8eb22670b24c350af0b54.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ae09a97dd40d6b317a448664bf3816.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5f4584826926dbc15fae9fb75d36ec.png)
(2)判断88是否为数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59038077a6db85e9b790b14eecf717a.png)
(3)若2024是数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b33a624f32310f1ef43686ea593ae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1180a64221e78248cb691ecc21ec18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64e05ea594b5b86bcbbad940b46000f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9c79f3f90e6ed44e479b2e4ff16f05.png)
您最近一年使用:0次
2024-04-17更新
|
1419次组卷
|
5卷引用:天津市南开中学2024届高三下学期模拟检测数学试题
天津市南开中学2024届高三下学期模拟检测数学试题2024届浙江省嘉兴市二模数学试题(已下线)第四套 艺体生新高考全真模拟 (二模重组卷)(已下线)压轴题08计数原理、二项式定理、概率统计压轴题6题型汇总(已下线)压轴题01集合新定义、函数与导数13题型汇总-2
4 . 已知
,a为函数
的极值点,直线l过点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
的解析式及单调区间:
(2)证明:直线l与曲线
交于另一点C:
(3)若
,求n.(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564a3336ddeba347978fee32ffb16631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc0021f960dba2b8860d09d9bf26872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ad344f3b6676f6e821cb687ba522268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)证明:直线l与曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978068ab8189f54a3365be8d73280f32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cffb0685e90e8d603813673a8f0801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513da43c5b2cbc26d9d53ab32274d3f7.png)
您最近一年使用:0次
5 .
,
,已知
的图象在
处的切线与x轴平行或重合.
(1)求
的值;
(2)若对
,
恒成立,求a的取值范围;
(3)利用如表数据证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f40b512163dd11b0523dd0da75f2206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d440669c516d6dff0fedaf3eed41aca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c6b6a11760d0724b0b60e55970e229.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
(2)若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f832d9cca2d5c9d76d38374e2a258d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
(3)利用如表数据证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9201fb7af855df0e2e7c82c2434a7b1.png)
1.010 | 0.990 | 2.182 | 0.458 | 2.204 | 0.454 |
您最近一年使用:0次
名校
6 . 下列说法正确的是( )
A.若事件![]() ![]() |
B.设随机变量![]() ![]() ![]() |
C.已知随机变量![]() ![]() ![]() |
D.在一个![]() ![]() |
您最近一年使用:0次
2023-07-09更新
|
360次组卷
|
2卷引用:天津市第七中学2024届高三三模数学试题
名校
7 . 已知函数
,
(
为自然对数的底数)
(1)当
时,求
的单调区间;
(2)
时,若函数
与
的图象有且仅有一个公共点.
(i)求实数
的集合;
(ii)设经过点
有且仅有3条直线与函数
的图象相切,求证:当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3392ab5afdbd80d316d4fd003920659a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5e80cdc7476f04bcc62813fa187446.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
(i)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(ii)设经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f00fdb0b1dfb21a2e192990b79be37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cdfaf0771d0dbe55309ad4640b143f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bb2da696e961d4e7c289691aa4ce9c.png)
您最近一年使用:0次
8 . 已知
是公比为q的等比数列.对于给定的
,设
是首项为
,公差为
的等差数列
,记
的第i项为
.若
,且
.
(1)求
的通项公式;
(2)求
;
(3)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecea6aa3b0b367dbd8d0e38c65829c33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac24dd2ff15d115696e8a9f8dad264f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c66a0c50c32fba396a322f0ddbeda4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac24dd2ff15d115696e8a9f8dad264f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f686d89f95d2dc846e53eab5ca99ddde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33c0acaa66514a4f1493b158ebd09e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2608df648efc5364a2dc2c67cfe14cd9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27dd9877202542cc6975d5a4d78724a.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88b0922dc08ae6398dfc0296037c759.png)
您最近一年使用:0次
2023-05-20更新
|
1160次组卷
|
3卷引用:天津市咸水沽第一中学2023届高考押题卷(一)数学试题
名校
解题方法
9 . 中国雕刻技艺举世闻名,雕刻技艺的代表作“鬼工球”,取鬼斧神工的意思,制作相当繁复,成品美轮美奂.1966年,玉石雕刻大师吴公炎将这一雕刻技艺应用到玉雕之中,他把玉石镂成多层圆球,层次重叠,每层都可灵活自如的转动,是中国玉雕工艺的一个重大突破.今一雕刻大师在棱长为12的整块正方体玉石内部套雕出一个可以任意转动的球,在球内部又套雕出一个正四面体(所有棱长均相等的三棱锥),若不计各层厚度和损失,则最内层正四面体的棱长最长为( )
A.![]() | B.![]() | C.![]() | D.6 |
您最近一年使用:0次
2023-05-18更新
|
1992次组卷
|
9卷引用:天津市北辰区2023届高三三模数学试题
天津市北辰区2023届高三三模数学试题天津市九校联考2023届高三模拟考试数学试题天津市河西区天津市第四中学2024届高考模拟预测数学试题河南省南阳市第一中学校2023届高三第三次模拟考试理科数学试题天津市滨海新区塘沽第一中学2024届高三上学期第一次月考数学复习卷1陕西省榆林中学2022-2023学年高一下学期第二次月考数学试题(已下线)第七章 立体几何与空间向量 第一节 第一课时 基本立体图形及表面积与体积(B素养提升卷)(已下线)专题13 一网打尽外接球、内切球与棱切球问题 (14大核心考点)(讲义)(已下线)第1套 复盘提升卷 (中等)【高一期末复习全真模拟】
10 . 中国古代数学家很早就对空间几何体进行了系统的研究,中国传世数学著作《九章算术》卷五“商功”主要讲述了以立体问题为主的各种形体体积的计算公式.例如在推导正四棱台(古人称方台)体积公式时,将正四棱台切割成九部分进行求解.下图(1)为俯视图,图(2)为立体切面图.
对应的是正四棱台中间位置的长方体;
对应四个三棱柱,
对应四个四棱锥.若这四个三棱柱的体积之和为12,四个四棱锥的体积之和为4,则该正四棱台的体积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/69341502-f634-4c2d-948d-966301818379.png?resizew=363)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871ba3565dbd2b49fc84bdb88c24c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e047d36b76062f43bfa0ca6451d2e259.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/69341502-f634-4c2d-948d-966301818379.png?resizew=363)
A.24 | B.28 | C.32 | D.36 |
您最近一年使用:0次
2023-05-03更新
|
1301次组卷
|
6卷引用:天津市2023届高三三模数学试题