名校
解题方法
1 . 已知等差数列
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/daf736cfe877b89a0b5d98049426f2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30eb42578f654fb61e826026d2199751.png)
A.33 | B.66 | C.22 | D.44 |
您最近一年使用:0次
2023-03-16更新
|
1755次组卷
|
12卷引用:四川省乐山市金口河区延风中学2024年高三上学期9月月考数学(理科)试题
四川省乐山市金口河区延风中学2024年高三上学期9月月考数学(理科)试题四川省巴中市2023届高三“一诊”考试数学(文)试题四川省巴中市2023届高三“一诊”考试数学(理)试题辽宁省沈阳市郊联体2022-2023学年高二下学期4月月考数学试题(已下线)专题10数列(选择填空题)(已下线)四川省巴中市2023届高三“一诊”考试数学(理)试题变式题1-5河南省南阳市第一中学校2022-2023学年高二下学期3月月考数学试题天津市宁河区芦台第一中学2023-2024学年第一学期高三年级第一次诊断河南省郑州市第三十一高级中学2022-2023学年高二下学期期中数学试题吉林省白城市通榆县毓才高级中学有限责任公司2022-2023学年高二下学期期中数学试题黑龙江省牡丹江第二高级中学2023-2024学年高二上学期期末模拟数学试题(已下线)模块四 专题2 期中重组篇(吉林卷)(人教B版高二下学期期中)
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2 . 非零实数
满足
成等差数列,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3764eec0b5e3e1415bb225c12d2663c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcba524ea58286f8bbea28ae85c66c5.png)
A.![]() | B.![]() | C.3 | D.![]() |
您最近一年使用:0次
2023-03-16更新
|
720次组卷
|
2卷引用:浙江省宁波市十校2023届高三下学期3月联考数学试题
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3 . 已知
,
,若
,
,
成等差数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93af88a7628c71d642d3a6df067c15f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0212ab68627919b1d22ac348a3e849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87879773a7ebf675a232100dceaf9a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6fce004c47849c29ebd8d5d7c16e98.png)
A.0或1 | B.1或![]() | C.1或![]() | D.0或![]() |
您最近一年使用:0次
4 . 在
中,角
,
,
所对的边分别为
,
,
,若
,
,
成等差数列,
,则
( )
![](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/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/fa9c678a23c9966125ee32f3f92e31ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9afe6e2307c6a8b0097a6c45b227c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-03-09更新
|
1018次组卷
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4卷引用:江西省赣州市2023届高三下学期3月摸底理科数学试题
江西省赣州市2023届高三下学期3月摸底理科数学试题江西省赣州市2023届高三摸底考试数学(理)试题(已下线)专题06三角函数与解三角形(选择填空题)(已下线)专题3.3 解三角形(分层练)(四大题型+7道精选真题)
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5 . 等差数列
中,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd9aa5ea928f401f91440cfa7870c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8224834ee7f14e3cec45cd5670137e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d70ee4210b1623e95879dab0d74ecc.png)
A.60 | B.30 | C.10 | D.0 |
您最近一年使用:0次
2023-07-26更新
|
779次组卷
|
4卷引用:四川省盐亭中学2023届高三上学期(12月)第四次模拟数学(文科)试题
解题方法
6 . 椭圆
的左、右焦点为
,过
的直线交椭圆于A,B两点.
,
的三边构成等差数列,则椭圆C的离心率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/1487423f-3ba2-40be-876e-de31d68023e0.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1e879a855cfcc91e681794b6eec8c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e420b016c21c69511fccabacdbf98f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/1487423f-3ba2-40be-876e-de31d68023e0.png?resizew=192)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2023-03-02更新
|
733次组卷
|
2卷引用:广东省海珠区部分学校2023届高三下学期2月大联考数学试题
名校
7 . 在等差数列
中,若
,
是方程
的两根,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e20a1bffcffb243c0e28d82c3e9768b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebce85ea9bc18815ef8887057030a63.png)
A.![]() | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
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8 . 双曲线的中心为原点
,焦点在
轴上,两条渐近线分别为
,
,经过右焦点
垂直于
的直线分别交
,
于
,
两点.已知
、
、
成等差数列,且
与
反向.则双曲线的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/5e578668ad5d0ad2b240ac6906c66f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d401876b078e318413b8ad876c54b7be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4303745ad1b7549611d2e86ec3ea8e20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7d3a0680780aaf4549c447fe8dfe9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bbfb3ee59b5a14e5011dcd146c0763.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-01-15更新
|
937次组卷
|
4卷引用:安徽省阜阳市第二中学2023届高三下学期第一次月考数学试题
解题方法
9 . 设等差数列
的前
项和为
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894aaec56149f880c7cf2bbc0f358d2b.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/6c454717b678b36cd514925cccae315b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bca8f26c7e2cf5c7c4eaf39b089ae52.png)
A.150 | B.120 | C.75 | D.60 |
您最近一年使用:0次
名校
解题方法
10 . 设数列
是等差数列,
是数列
的前n项和,
,
,则
等于( )
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d324048b18a4bf7b71c2e74e94629f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ec42a1fb4d702c725f469141866bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
A.10 | B.15 | C.20 | D.25 |
您最近一年使用:0次
2022-11-16更新
|
713次组卷
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5卷引用:四川省仁寿第一中学校(北校区)2023-2024学年高三上学期9月月考文科数学试题