1 . 设数列
的前
项和为
,
,
,若
,则正整数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c840b24a1626f247eefe7371c8abb50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16c5c6c416370c28c70dfb9fe1d769f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.2024 | B.2023 | C.2022 | D.2021 |
您最近一年使用:0次
2 . 已知数列
满足
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8512f68b6b3d3e990d2ccf52504b6d8a.png)
A.![]() | B.![]() |
C.![]() | D.数列![]() ![]() |
您最近一年使用:0次
名校
解题方法
3 . 已知数列
满足:①
;②当
时,
;③当
时,
,记数列
的前
项和为
.
(1)求
的值;
(2)若
,求
的最小值;
(3)求证:
的充要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9af4e10e79081d9d8f308f4469602a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e4e227352dd59fd2db5668eef89696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f7428a907e1e376d64b44d693f2955f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0890b68f92a6f8c158aa50b37a97f700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a5945ce5c2114af8c18718ca8dc899.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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26456abc978dd2173dedc6ffdf181fc0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d6b8f10142a7b23ee19cae223f378c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0f924858fdfc9403142fcbce46de32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526e30684a73181d5863bdacd62fbf0e.png)
您最近一年使用:0次
名校
解题方法
4 . 数列
的前
项和为
,则
可以是( )
![](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/32c58093fdb69854da3cb129789def99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599e7f2f8baaa37baa05e1415b790bbb.png)
A.18 | B.12 | C.9 | D.6 |
您最近一年使用:0次
7日内更新
|
1216次组卷
|
5卷引用:重庆市第一中学校2023-2024学年高二下学期5月月考数学试题
5 . 设
的整数部分为
.
(1)求数列
的通项公式;
(2)求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0c384e882e1eed97e08060c45305ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fbc7151b87e56d08b266f91d0d496fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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6 . 在一个有穷数列的每相邻两项之间插入这两项的和,形成新的数列,我们把这样的操作称为该数列的一次“和扩充”.如数列1,3,第1次“和扩充”后得到数列1,4,3;第2次“和扩充”后得到数列1,5,4,7,3;依次扩充,记第
次“和扩充”后所得数列的项数 记为
,所有项 的和记为
,数列
的前
项为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6368fec0c2c25db7c29b014d60270e97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.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)
A.![]() | B.满足![]() ![]() |
C.![]() | D.![]() |
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7 . 一质点在平面内每次只能向左或向右跳动1个单位,且第1次向左跳动.若前一次向左跳动,则后一次向左跳动的概率为
;若前一次向右跳动,则后一次向左跳动的概率为
.记第n次向左跳动的概率为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e948956b4ef1bb5fa3c09fbda213dee.png)
________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11c04103c0e5416897894d9225637b2.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e948956b4ef1bb5fa3c09fbda213dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11c04103c0e5416897894d9225637b2.png)
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8 . 已知数列
满足
,
,记数列
的前
项和为
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6a6786b2d1d6930b1b7711f07bd6ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0522be0e1b5b16ffe6d9bc03a5ad386.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)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 已知
为等差数列,
为公比
的等比数列,且
,
,
.
(1)求
与
的通项公式;
(2)设
,求数列
的前
项和
;
![](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/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebaf2a2590bb84d646957f913d78f6dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769fe52ac96348d3b12d23d06d702595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccfe26b3ab1cd6a93075f24b696b0cef.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56b8ba45240095a2a2a36cc4b2ad180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a107ab533d39b3bd0933429156ff33bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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10 . 数列
的通项公式为
是其前
项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb261bb45b5137a7236ccddcfdface6f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab8a569a7ee848d91bdd559323bc090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb261bb45b5137a7236ccddcfdface6f.png)
您最近一年使用:0次
2024-05-30更新
|
314次组卷
|
2卷引用:江西省九江市武宁尚美中学2023-2024学年高二下学期5月月考数学试题