1 . 已知直线
经过椭圆
的左焦点
,且与椭圆
相交于
,
两点,
为椭圆的右焦点,
的周长为8,则此椭圆的短轴长为__________ ;弦长![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3d627f5fbd04271389d503942d233.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4690597bc0883f8932494c135a11433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3d627f5fbd04271389d503942d233.png)
您最近一年使用:0次
2 . 数列
的前
项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.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/5bc1dda068b34ce0a8062dd790f03e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780019495df34d40fff9d8f31bbf3e74.png)
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解题方法
3 . 在
中,
为边
上的动点,沿
将
折起形成直二面角
,当
最短时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6231cddd5c293f9c03d036ffd18a08b1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0214342424fb6a47671af68e183d82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e040e4c24c122baf7e1763160a2d216e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6231cddd5c293f9c03d036ffd18a08b1.png)
您最近一年使用:0次
4 . 数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec90d135ea72ac884a8e1415436dcd.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a5b2d7284d48e2c093a7b57e8e4981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ec90d135ea72ac884a8e1415436dcd.png)
您最近一年使用:0次
5 . 已知椭圆
,过点
的直线与椭圆
交于
,
两点,且满足
,则直线
的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4159d2ea599344d86d60382ca636495d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9f126b403d7a21f841c92ae089878a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ab28821e5d304dae10bce5aac560c8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
6 .
是双曲线
上一点,点
,
分别是双曲线左右焦点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5ecc35b2ad878d62f4c4210023de15.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a44342c2ee26a279265225982499b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27ad0481b4eba360acafcc03919d4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5ecc35b2ad878d62f4c4210023de15.png)
您最近一年使用:0次
2023-12-02更新
|
366次组卷
|
2卷引用:广西玉林市博白县2023-2024学年高二上学期11月六校联考数学试卷
名校
解题方法
7 . 已知椭圆E:
的左、右焦点分别为A,B,若E上存在点P满足:
,则E的离心率的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c27ed2753bc9782bc9fa26755eb582.png)
您最近一年使用:0次
2023-11-19更新
|
337次组卷
|
4卷引用:广西壮族自治区玉林市博白县五校2023-2024学年高二上学期12月联考数学试卷
解题方法
8 . 已知直线
:
和直线
:
垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c93c4093f63750592ad63dd781c9f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628e27acba2269f5a24bfb8bd9a4cb87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
2023-11-18更新
|
286次组卷
|
3卷引用:广西壮族自治区玉林市博白县五校2023-2024学年高二上学期12月联考数学试卷
9 . 底面半径为4的圆锥被平行于其底面的平面所截,截去一个底面半径为2,高为3的圆锥,所得圆台的体积为______ .
您最近一年使用:0次
2023-11-10更新
|
219次组卷
|
3卷引用:广西壮族自治区玉林市2023-2024学年高二上学期11月期中考试数学试题
广西壮族自治区玉林市2023-2024学年高二上学期11月期中考试数学试题广西示范性高中2023-2024学年高二上学期期中联合调研测试数学试题(已下线)8.3.1棱柱、棱锥、棱台的表面积和体积(分层作业)-【上好课】
解题方法
10 . 已知双曲线
左右焦点分别为
,
,过
的直线在第一象限与双曲线相交于点
,与
轴的负半轴交于点
,且
,
,则双曲线的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c8ef9a091408805985b984bf4c392e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6c7487e305985ad2b7b4f053638e87.png)
您最近一年使用:0次
2023-11-10更新
|
362次组卷
|
2卷引用:广西壮族自治区玉林市2023-2024学年高二上学期11月期中考试数学试题