23-24高二下·全国·课前预习
1 . 数列的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
数列前
项和的概念数列
从第1项起到第
项止的各项之和,称为数列
的前
项和,记作
,即
______ .
数列的前
项和
与通项
的关系若数列
的前
项和为
,则当
时,
;当
时,
;则
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
数列前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/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/04c2864e2ec3416cc4c081ac1f71a0af.png)
数列的前
![](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/96abfe2da27a63e6affb19a0c80236d9.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8d9e0c9781bac9ba899c3c5a7bdb9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec7b88f0fe2981434a30e1fd72b782e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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23-24高二下·全国·课前预习
解题方法
2 . 判断正误,正确的写正确,错误的写错误.
(1)等差数列前
项和公式的推导方法是倒序相加.( )
(2)若数列
的前
项和
,则
为常数列.( )
(3)等差数列的前
项和,等于其首项、第
项的等差中项的
倍.( )
(4)
.( )
(1)等差数列前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若数列
![](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/8271bf23009e445137406321047a142b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(3)等差数列的前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0365855d9f439487911ff2391fb1ff70.png)
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名校
解题方法
3 . 古典吉他的示意图如图所示.
分别是上弦枕、下弦枕,
是第
品丝.记
为
与
的距离,
为
与
的距离,且满足
,其中
为弦长(
与
的距离),
为大于1的常数,并规定
.则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/096bdbab-97eb-4a78-b8e7-5a836d93bbcc.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeda6556b273180b66a53659eeadac34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/803a8ea4247016155c9a187ebaa53638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a272adba0f1120109824440f0e252c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d684305a0fdb39ba43c738a01a5f90d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f4e3e503b6e4970d4cd280a85de40eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e819b87f90651d89fcd258c276294e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7760ff37388ab870612d3c6c31a5af2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4705a5b146767de8e657442da533c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4df525d052e612fcb6120564748885c3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/20/096bdbab-97eb-4a78-b8e7-5a836d93bbcc.png?resizew=231)
A.数列![]() ![]() |
B.数列![]() ![]() |
C.数列![]() ![]() |
D.数列![]() ![]() |
您最近一年使用:0次
2023-11-02更新
|
601次组卷
|
4卷引用:第4.3.1讲 等比数列的性质及其应用(第2课时)-2023-2024学年新高二数学同步精讲精练宝典(人教A版2019选修第二、三册)
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