如图,抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
和圆
,直线
经过抛物线的焦点,依次交抛物线与圆于A,
,
,
四点,
,则
的值为( )
![](https://img.xkw.com/dksih/QBM/2017/4/2/1657325444030464/1659043558932480/STEM/55916b2008e240b3be11c86657d2266d.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75ed10db4b9747a4b6d865b774f6b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a382e1d7bbf2d32101463a45603aca62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c22e4d48fef3cfa643767c4a9042bbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://img.xkw.com/dksih/QBM/2017/4/2/1657325444030464/1659043558932480/STEM/55916b2008e240b3be11c86657d2266d.png?resizew=119)
A.![]() | B.1 | C.![]() | D.![]() |
更新时间:2017-04-05 09:15:40
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相似题推荐
单选题
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【推荐1】双曲线
的左准线为l,左焦点和右焦点分别为
和
;抛物线
的准线为l,焦点为
;
与
的一个交点为M,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42a960d9c62f797d46caa7a8a4a134a.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/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab9238a9fed42bb7add1112bc76056a.png)
A.![]() | B.1 | C.![]() | D.![]() |
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解题方法
【推荐2】已知抛物线
的焦点为
,过点
的直线
与抛物线
及其准线分别交于
两点,
,则直线
的斜率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451bba39102302ad0ded030557866e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
【推荐1】点M、N在圆上,且M、N两点关于直线
对称,则圆C的半径( )
A.最大值为![]() | B.最小值为![]() | C.最小值为![]() | D.最大值为![]() |
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【推荐2】已知圆
与y轴交于A,B两点,圆心为C.若
,则实数m的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32a16037f69cc46f09915e1139ff2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ba5383e768dc86e1bfd79c10f96f4d.png)
A.![]() | B.![]() | C.3 | D.8 |
您最近一年使用:0次
【推荐1】已知抛物线C:
的焦点为F,过点F且倾斜角
的直线l与C交于A,B两点,O为坐标原点,若
的面积
,则线段AB的中点M到y轴的距离是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e186ebc624ebacde9a03b96289f1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7002020748a76913d826c0c33ba864e.png)
A.8 | B.5 | C.3 | D.2 |
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解题方法
【推荐2】设F为抛物线
的焦点,过F的直线交抛物线C于A,B两点,且
,O为坐标原点,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cff13ca0a66d587879abdbb594b806d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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