解题方法
1 . 给定正实数
,设
.试求
的最小值与最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e14206c7d228a7c2259a7b27da8813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8aa259a7d23a2e1337f7288e8860cc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a730766c7f02fcdcb82b2713c1a57ea0.png)
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2 . 设
是正整数,且
,并满足
.试求出
所有可能的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212c82587ab19801f2646fd69abc79e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a2da15bff96820cea22b0392d4201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2539e7ed624c8a738d353c9a885b378d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c524411686a21c9564c4bc183a01e30.png)
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名校
3 . 已知数列
,满足
,
,
.
(1)求证:数列
为等差数列;
(2)设
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a093564f7e01d40745115a9df8bb09f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0de50de60a49ad26a5b9826b7dd2fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
您最近一年使用:0次
2020-04-27更新
|
396次组卷
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2卷引用:新疆博尔塔拉蒙古自治州第五师高级中学2019-2020学年高三上学期第二次月考数学(理)试题
名校
4 . 定义:
,已知数列
满足:
,若对任意正整数,都有
成立,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0570307e5eda956442ae0eab4aab3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/537056200a9bf08fc269f9e974ece45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2ec68db4ed46f009a45d55c3d4a6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
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5 . 已知数列
的前
项和为
,且
,若集合
中恰有三个元素,则实数
的取值范围是_______ .
![](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/c8370a173854471a3eb27637993a3d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/959be36dc6e4151e7157e3c4f3eef2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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2019-04-24更新
|
612次组卷
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2卷引用:【省级联考】新疆2019届高三第三次诊断性测试数学(文)试题
6 . 已知数列
为等差数列,
,
,数列
的前n项和为
,若对一切
,恒有
,则m能取到的最大正整数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6cba1c8664b34e66cc939186067c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fc423d573ec7531759c8f9857e5d76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a9eb8a62778c64778d1f27364f38a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b708c8dcb2d66eb2ce0b3718a9cd924a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8c29b297e3ec337c3139c2a1ebed1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e88e777ccf7af79de9d0776d74c7f7.png)
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7 . 设
是数列
的前
项和,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea5fd455a59e0aba1ccad4f1f447ad8.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522ff52cc9b37b792371f7f96487a39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea5fd455a59e0aba1ccad4f1f447ad8.png)
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8 . 在数列
中,
,其前
项和为
. 若点
在直线
上,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.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/3908f0499cc658fc638a5675745ad1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e212cdbfba6610bc55df2c1a737407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
A.1290 | B.1280 | C.1281 | D.1821 |
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2018-12-21更新
|
1131次组卷
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2卷引用:【市级联考】新疆昌吉市教育共同体2019届高三上学期第三次月考数学(文)试题
9 . 若关于
的不等式
,在
上恒成立,,则实数
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afcc5877e7551430e37f8d791bc6e0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.1 |
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2018-12-21更新
|
895次组卷
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4卷引用:【市级联考】新疆昌吉市教育共同体2019届高三上学期第三次月考数学(文)试题
【市级联考】新疆昌吉市教育共同体2019届高三上学期第三次月考数学(文)试题【校级联考】新疆昌吉市教育共同体2019届高三上学期第三次月考(12月)数学(理)试题(已下线)专题7.1 不等式的性质及一元二次不等式(练)【文】-《2020年高考一轮复习讲练测》(已下线)专题7.1 不等式的性质及一元二次不等式(练)-江苏版《2020年高考一轮复习讲练测》
10 . 已知数列
的前
项和为
,且
,
(
),若
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb0f2883ddd23be9435fda33e9c611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/508a3cfbc13c723c24918b7f416442e7.png)
则数列的前
项和
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6卷引用:2019届新疆乌鲁木齐地区高三第三次质量检测数学(理)试题
2019届新疆乌鲁木齐地区高三第三次质量检测数学(理)试题上海市上海师范大学附属中学2018-2019学年高三下学期质量检测数学试题上海市长宁、嘉定区2018届高三第一次质量调研(一模)数学试题(已下线)《2018届优生-百日闯关系列》数学专题 二 第五关 以数列求和或者通项公式为背景的填空题(已下线)《2018届优生-百日闯关系列》数学专题四 专题四第六关2018届上海市嘉定、长宁区高三一模数学试题