名校
1 . 已知等差数列
的前n项和为
.
(1)求数列
的通项公式;
(2)设
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe8a999017291da3c27d601a3b212e2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1caaa58f90a778e24b1d335af3467f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2022-11-15更新
|
1472次组卷
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4卷引用:甘肃省庆阳市环县第一中学2023-2024学年高二上学期期末考试数学试题
名校
2 . 已知
是等差数列,
,
,则
的公差
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad6215998615f88afe9fac514926945.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb334e165679c6cb500c994cffa47147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
A.3 | B.4 | C.-3 | D.-4 |
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2022-07-22更新
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8卷引用:甘肃省兰州市第二十七中学2022-2023学年高二上学期期中数学试题
名校
解题方法
3 . 已知
为等差数列,前n项和为
,数列
是首项为1的等比数列,
,
,
.
(1)求
和
的通项公式;
(2)求数列
的前n项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86891297d63888a6000ba4fb5561905b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94274c656bd8aab884f65731086936c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f2e3124f76b858907460a311633a441.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e1ceae924eae232f5b8c07f37a377f.png)
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2021-09-17更新
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8卷引用:甘肃省张掖市某重点校2022-2023学年高二下学期2月月考数学(文)试题
20-21高一下·浙江·期末
名校
4 . 在
中,角A,B,C所对的边分别为a,b,c,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() |
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7卷引用:甘肃省张掖市第二中学2021-2022学年高二上学期10月月考数学 理科(B)试题
解题方法
5 . 设
中角A,B,C的对边分别为a,b,c,
.
(1)若
,
,求b;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8c65bea2c80af038768b74250c694e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a5801e8be81aae66c47cc058fe370c.png)
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2卷引用:甘肃省平凉市第二中学2022-2023学年高二下学期第二次月考数学试题
6 . 在等差数列
中,
,
,则公差d等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
A.![]() | B.1 | C.![]() | D.2 |
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2021-01-17更新
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2卷引用:甘肃省白银市会宁县2020-2021学年高二上学期期末考试数学(文)试题
解题方法
7 . 已知数列
满足
,
,求:
(1)
的通项公式
(2)
的前100项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a7a688d0ee0a930ef9bf94771a1953.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced4e381e8c3336848b8c436dbc584f3.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c9965a04c2a6de04e949a15762f372.png)
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2021-01-17更新
|
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2卷引用:甘肃省白银市会宁县2020-2021学年高二上学期期末考试数学(文)试题
名校
解题方法
8 . 在
中,内角
,
,
所对的边分别为
,
,
,若
,且
,则
的形状是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2681f0d1732bcaa8d6362fbd1fa6caa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7946c1ed10fd9dee06dcbca24795e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.锐角三角形 | B.钝角三角形 |
C.等腰直角三角形 | D.直角三角形 |
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2021-09-10更新
|
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2卷引用:甘肃省兰州第一中学2021-2022学年高二上学期期中数学试题
名校
9 . 在正项等比数列
中,
,
,满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527bd6adefbb15deb6ad829d7584d072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c94a3db27ef2e955b32fc9b5dce9bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.4 | B.3 | C.5 | D.8 |
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2020-12-01更新
|
2001次组卷
|
6卷引用:甘肃省定西市临洮中学2021-2022学年高二上学期第二次月考理科数学试题
名校
解题方法
10 . 已知数列
的前
项和
.
(1)求数列
的通项公式;
(2)设
,求数列
的前
项和
.
![](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/1a7570e5b09898216392b46e85168978.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cf3d001f08a015d2f8091902d7f307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a6c852d593cb9f6bdfd9eeddb50fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2020-12-04更新
|
1307次组卷
|
2卷引用:甘肃省白银市会宁一中2020-2021学年高二(上)期中数学(理科)试题