解题方法
1 . 已知
是数列
的前n项和,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.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/8058bca6dab36ed8329eef012da95994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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2 . 已知
是以点
为圆心,
为半径的圆上的点,则点
到原点的最小距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08c1e6540c2ed6252c0fa9cad6bccdcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
3 . 若椭圆
上一点
到焦点
的距离为
为
的中点,
是坐标原点,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc790d06c749b3ec7ae391a80e5201c.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf679418512d6ad973531df808fd267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3be4a542cb50e7c2f9fa065112674d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc790d06c749b3ec7ae391a80e5201c.png)
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解题方法
4 . 等差数列5,8,11,…与等差数列3,8,13,…都有100项,那么这两个数列相同的项共有______ 项.
您最近一年使用:0次
5 . 等差数列
中,其前
项和为100,其前
项和为500,则其前
项和为______ .
![](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/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
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6 . 已知点P是曲线
上的一点,则点P到直线
的最小距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
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2023-12-19更新
|
1230次组卷
|
5卷引用:安徽省安庆市怀宁县第二中学2023-2024学年高二上学期期末数学试题
名校
解题方法
7 . 已知直线:
,
:
,
:
,若直线
,
,
不能围成三角形,则
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2023-11-21更新
|
132次组卷
|
2卷引用:安徽省安庆市桐城中学2023-2024学年高二下学期开学检测数学试题
8 . 已知直线l:
恒过点P,点Q在直线
上,则
的最小值为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a49a4b336b7232c6c5c9acfc536e9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8a3365e99f926b1dafa901ab232152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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2023-11-16更新
|
182次组卷
|
2卷引用:安徽省安庆市第七中学2023-2024学年高二上学期期中考试数学试题
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解题方法
9 . 已知
的内角
、
、
的对边分别是
,
,
,若
,
,
,则
的面积为_____________ .
![](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/7eeebba914a615edfd0edd8c79bdbc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f01eb791aa2ec0ab9ec823fd322c24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2023-11-06更新
|
262次组卷
|
2卷引用:安徽省桐城中学2023-2024学年高二上学期第一次教学质量检测数学试题
名校
解题方法
10 . 已知椭圆C:
(
)的左、右顶点分别为
,
,且以线段
为直径的圆与直线
相交,则椭圆C的离心率的取值范围为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473913c0887bb64d386f4c02f1853452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bcec69d7e50af1138dca3a3859740a.png)
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