解题方法
1 . 在等比数列
中,
(1)已知
,
,求
;
(2)已知
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5b78d8869e45eb2baf7422155a0992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dd8dd8f0b19d19d17dd748d7df1ddd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/924735888453775e0865af82c66497fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370dc270435bcca46afdfabc3a34ee1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dd8dd8f0b19d19d17dd748d7df1ddd.png)
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名校
2 . 已知等比数列
是其前
项和,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4930a369c43166fbb10757a42339ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c257f6b75bba29390caa58958cbeee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3f9b0da49dd84593d5ce1f2a658fb6.png)
A.![]() | B.8 | C.7 | D.14 |
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昨日更新
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252次组卷
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3卷引用:甘肃省靖远县第一中学2023-2024学年高二下学期6月期末考试数学试题
3 . 已知公比为
的等比数列
的前
项和为
,则满足对任意
,
恒成立的一个充分不必要条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520b3833cc5652d4c70ef48fa3c494ab.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() |
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4 . 已知正项等比数列
的前n项和为
,且
.
(1)求数列
的通项公式;
(2)若数列
满足
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f94b4a9618419f40dd35ddccd2d346.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebb26f1c93636c44c83e89f95daa0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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5 . 已知
为等比数列,若
,且
与
之和的算术平方根为5,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f9047fc39366f11951dd3aca060e30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc694dd559ba6da957de6aee312eb61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ddfb6fbc4d8ec6b7abeaf3bd18875.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 正项等比数列
的前
项和为
,若
,
,则
( )
![](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/daec249a65a576e1238c9291aee37d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53336b8da6b325a9fe6662facc798d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
A.9 | B.![]() | C.9或![]() | D.18 |
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解题方法
7 . 在等比数列
中,
,数列
的前10项的积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fef4c617d182432f9bc737ec12ebbf42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 在等比数列
中,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f86a8746a583f411fb73c6334eb27b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ea3939532988e2aa1c96b11245f3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb7147e313f9d9f67d19ecb5f499c05.png)
您最近一年使用:0次
名校
解题方法
9 . 已知等比数列
满足
.
(1)求
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/9fc6db3b1142ed663ee64d28e301c903.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f028090918966558bb9a871b599a6389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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解题方法
10 . 下列说法正确的是( )
A.已知等比数列![]() ![]() ![]() |
B.数列![]() ![]() ![]() ![]() |
C.设![]() ![]() ![]() |
D.设![]() ![]() |
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