20-21高二·全国·课后作业
解题方法
1 . 设
是等比数列,且
,证明数列
是等差数列,并求出这个等差数列的首项与公差.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4711944aa361bd9f2ed566b24c6888ec.png)
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2 . 利用等比数列的前n项和公式证明
,其中
,a,b是不为0的常数,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af18c03aa5ec76ed9f82b401ae96584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
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20-21高一·江苏·课后作业
3 . 证明下面的结论:
(1)如果
,
,且
,那么
;
(2)如果
,
,那么
;
(3)如果
,
,那么
;
(4)如果
,
,
,那么
.
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbc322861846709c08c7f1da746848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca24341509c05e672999202f2df0ebaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e271b6e63206285461a7552d11efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d89ab55ffb93cc48f077b542dbd25aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86f39f99ebfadbe8d8b7dd2b08476a25.png)
(4)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d89ab55ffb93cc48f077b542dbd25aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f93dcad997a94b38329bd3cfb48962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b401efefaa63cfdb2129fbe399e0a8f.png)
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4 . 在等比数列
中,如果对任意的
,都有
,求证:数列
为等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4711944aa361bd9f2ed566b24c6888ec.png)
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21-22高一·湖南·课后作业
5 . 求证:
(1)若
,且
,则
;
(2)若
,且
,
同号,
,则
;
(3)若
,且
,则
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0e271b6e63206285461a7552d11efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4477891a0849eed531ba60d9a2549582.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90882db1028f1e2440339d203c1901e6.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d89ab55ffb93cc48f077b542dbd25aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c9ff675ef70be29c94704f11dd900d9.png)
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20-21高一·江苏·课后作业
解题方法
6 . 已知
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4a8ffa80d00ef77c53c9853e3c6e7d.png)
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21-22高一·湖南·课后作业
7 . 利用不等式的性质证明下列不等式:
(1)若
,
,则
;
(2)若
,
,则
.
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5197a4059d79e7ad2954b387d17d1ac8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ab74d7f34dda733dca9aa3dac2a282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f1c548c99f9b3a96ad97155617148.png)
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2022-02-23更新
|
617次组卷
|
8卷引用:3.1 不等式的基本性质 (1)
(已下线)3.1 不等式的基本性质 (1)(已下线)2.1 等式性质与不等式性质精练-【题型分类归纳】(已下线)专题2.1 等式性质与不等式性质-举一反三系列湘教版(2019)必修第一册课本习题 习题2.1(已下线)习题2.1(已下线)专题15 等式性质与不等式性质-2022年暑假初三升高一数学衔接知识自学讲义(人教A版2019)(已下线)突破2.1 等式的性质与不等式的性质(课时训练)(已下线)第05讲 等式性质与不等式性质(7大考点)-2022-2023学年高一数学考试满分全攻略(人教A版2019必修第一册)
20-21高一·全国·课后作业
8 . 在
中,斜边c等于
外接圆的直径2R,故有
,这一关系对任意三角形也成立吗(如图)?探索并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c30b12f8bf54428846cf378ffd5a23b7.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2849051998388224/2849773829832704/STEM/9fe85621-a425-48b5-b514-51d363e38aa8.png?resizew=355)
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20-21高二·全国·课后作业
名校
9 . 已知函数
,设数列
的通项公式为
,其中
.
(1)求证:
;
(2)判断
是递增数列还是递减数列,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1d597c88855d0a682c91e726ba140cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58e99e3c3a921cd712906b0a3b1091d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f690e661124de19eceb1fa80a69e69.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2021-11-05更新
|
532次组卷
|
4卷引用:人教B版(2019)选择性必修第三册课本习题5.1.1 数列的概念
人教B版(2019)选择性必修第三册课本习题5.1.1 数列的概念(已下线)第五章 数列 5.1 数列基础 5.1.1 数列的概念(已下线)4.1.1 数列的概念(练习)-2022-2023学年高二数学同步精品课堂(人教A版2019选择性必修第二册)1.1数列检测题 A卷(基础巩固)