已知抛物线
与双曲线
有一个公共的焦点
,点
为抛物线上任意一点,
,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18913ecf1b191b490ba84c36550d5d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cf8af6e62058cc4e2d83d5da7f4c68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63876d267e50af3a425d5ac44698fc32.png)
19-20高三上·重庆沙坪坝·阶段练习 查看更多[3]
2020届重庆南开中学高三上学期第四次教学质量检测数学(文)试题重庆市北碚区西南大学附属中学校2019-2020学年高二上学期期末数学试题(已下线)专题18 圆锥曲线选填中档题汇编(1)-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)
更新时间:2020-02-09 17:00:26
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【推荐1】下列说法中错误的序号是: _________
①已知
恒成立,若
为真命题,则实数
的最大值为2;
②已知三点
共线,则
的最小值为11;
③已知
是椭圆
的为两个焦点,点
在椭圆
上,则使三角形
为直角三角形的点
个数4 个;
④在圆
内,过点
有
条弦的长度成等差数列,最小弦长为数列的首项
,最大弦长为
,若公差
那么
的取值集合为
.
①已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2b26b6579f1dd9875d2f24e943f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②已知三点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/862bc1c9704866110be9e687ed5324be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c889f50235620e5dbe7e9eeb8480a922.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3cfb07fcf2c1bf055d517631d80b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd5a8e1bc9748e5519dcd9981b7eb251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
④在圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8488cc02b3cd29f714dc01b78ae70bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cc839d42762fb509859035b11dae8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e03019ae02ab0bf6d2b9e1a1463b48e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425bb20228455bae806d83e90c53da14.png)
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【推荐2】已知关于
的不等式
的解集为
,且
为有限集,则集合
元素个数最少时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f9fabbbe61a759e52ec975215e2e7c.png)
______ (用列举法表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eeff58f1c35c8426b32460a3ae848eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ef28bd0bef45b9373502007fd94cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f9fabbbe61a759e52ec975215e2e7c.png)
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解题方法
【推荐1】设
为原点,双曲线
的右焦点为
,点
在
的右支上.
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b30352c43707c4e54b94ce5b61f2e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfefb3a4b7b159153ec60eecd954c877.png)
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【推荐2】已知双曲线E:
的一个焦点与抛物线C:
的焦点相同,则双曲线E的渐近线方程为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44b5f3e53e5b38bf1618a62ba939b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fd8561b97af291594400e7e629d2fa4.png)
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【推荐1】已知双曲线C1:
=1(a>0,b>0)的离心率为2.若抛物线C2:x2=2py(p>0)的焦点到双曲线C1的渐近线的距离为2,则抛物线C2的方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2ea8fcb101c2ecba2b2c862eb66b7f.png)
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【推荐2】已知抛物线
的准线方程为
,在抛物线
上存在两点
关于直线
对称,且
为坐标原点,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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