2023·全国·模拟预测
解题方法
1 . 已知
是数列
的前
项和,
,
(
),
.
(1)证明:数列
为等差数列;
(2)设
,数列
的前
项和为
,若
,求正整数
的最小值.
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7c2f43f881eafde7815659a56fd3931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ec386f0f3ddad65efa9fac2d5bc5d0.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1232529c2de5022fdf6ff1a702e8d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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/d009374af16e94bbbd44cab1f9e92427.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2020高一·上海·专题练习
2 .
的定义域为
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)求证:
;
(2)
在
最小值为
,求
的解析式;
(3)在(2)的条件下,设
表示不超过
的最大整数,求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c207c772848becff65515cff91879823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf204e8357b7b74b7056c17aba7d4d9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3a915c1a8a9304aeb307d130faaeb15.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f834919ae05f160dfedc4305851c1c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032e3d25c9f38a3cf745fed1ce3297be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fab6009ffb15a88bd843a1c2b8d7770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56940904b01a6b66a0f8feb551962b69.png)
您最近一年使用:0次
3 . 若实数x,y,m满足
,则称x比y接近m,
(1)若
比3接近1,求x的取值范围;
(2)证明:“x比y接近m”是“
”的必要不充分条件;
(3)证明:对于任意两个不相等的正数a、b,必有
比
接近
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4efe2bd1a70890686b5301836e3ab9f7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0d8f793466e8e5d1c04ac4d2b61fce3.png)
(2)证明:“x比y接近m”是“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac759fcccff5268aa820cc539c06196a.png)
(3)证明:对于任意两个不相等的正数a、b,必有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a977414a3ad65caf5eee28e0cd175de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe2b05214c8b22507f0c36b110593d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c717d2811d58b258ce0b08ff602c027.png)
您最近一年使用:0次
2020-12-03更新
|
1850次组卷
|
12卷引用:上海市华东师范大学第一附属中学2020-2021学年高一上学期期中数学试题
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