1 . 已知
的内角A,B,C的对边分别为a,b,c,
的面积为
,
为
的角平分线,且交
于点D,
.
(1)若
,求
的周长;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1da58573adede69984f16560dee854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43efdcf995d5c26d1075de445a986e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
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名校
2 . 已知函数
的四个零点是以0为首项的等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a033cc4202bfdc2cca53c698cfa1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
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2023-12-28更新
|
206次组卷
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2卷引用:山西省忻州市三重教育2024届高三上学期12月联考数学试题
3 . 已知数列
的前n项和为
,
,
(
).
(1)求
的通项公式;
(2)设数列
,
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/9f0a53b6755b419e78cb64cc193ce826.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274b21dca7236fab7bb143dbe7de74ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a5a59be5dbb975e898afe484ccafec.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace04ac9780f3c07a737f5d2c1feb877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d44ddab6e0c60119be69985ae7fa65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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4 . 已知数列
的前n项积为
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1637d00895b998dccf41dadeaeb8fa50.png)
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1637d00895b998dccf41dadeaeb8fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35d68e25ce1fddf2d974705bf526803.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
2023-12-28更新
|
1076次组卷
|
7卷引用:山西省忻州市三重教育2024届高三上学期12月联考数学试题
山西省忻州市三重教育2024届高三上学期12月联考数学试题广东省广州市广东实验中学2024届高三上学期大湾区数学冲刺卷(五)(已下线)吉林省长春市长春吉大附中实验学校2023-2024学年高二上学期1月期末数学试题(已下线)专题04 数列(2)(已下线)专题09 数列求和6种常见考法归类(3)(已下线)专题08 求数列通项17种常见考法归类(4)四川省雅安市天立教育集团2023-2024学年高二下学期开学考试数学试题
5 . 设等差数列
的前
项和为
,
,
.
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.
![](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/5a0313eea2c65393728d83a287a8b799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5032706dd285c22e149c675da465d9ac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ebf05ca12f9da810b2b10e066ececf.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2023-09-05更新
|
384次组卷
|
3卷引用:山西省忻州市名校2024届高三上学期开学联考数学试题
名校
解题方法
6 . 如图,在
中,
,
,
.
(1)求
的值;
(2)过点A作
,D在边BC上,记
与
的面积分别为
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702f3bab242d53b8fbcb9fde925953b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/27/d8db7e1c-dd81-4120-9c30-b5ab406f7221.png?resizew=186)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3281279fd172040eadc139ee61581a5a.png)
(2)过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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2023-08-27更新
|
1666次组卷
|
6卷引用:山西省忻州市名校2024届高三上学期开学联考数学试题
名校
解题方法
7 . 在正三棱柱
中,
,点D在棱BC上运动,若
的最小值为
,则三棱柱
的外接球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bff9f8e4788640f9bf8ba2bf19b4e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50690dab38f4512eb72e18b7f86cf6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-08-27更新
|
724次组卷
|
6卷引用:山西省忻州市名校2024届高三上学期开学联考数学试题
8 . 不等式
的解集是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f921341b2518207896f11e0e540b5be.png)
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解题方法
9 .
、
满足约束条件:
,则
的最小值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c8c65efbd6e954fe0a17747eac62e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73192b1b3394925c0b6483fcd811f764.png)
您最近一年使用:0次
解题方法
10 . 已知数列
的通项公式为
,则数列
成等比数列是数列
的通项公式为
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f623d6367e06b2275e516bc6a327704f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2767882820f4ba0defde0e412adb747f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a8100f98999e472945ab7050af50d3.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次