1 . 已知F是抛物线C:
(
)的焦点,
是抛物线C上一点,且
.
(1)求抛物线C的方程;
(2)若直线l与抛物线C交于A,B两点,且线段AB的中点坐标为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b35f0b940c8422ef47edc3b7ce55e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c16d7af5da5979ab880c417f0390f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b7937d2541afc6351464650727a8fc.png)
(1)求抛物线C的方程;
(2)若直线l与抛物线C交于A,B两点,且线段AB的中点坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7499e86152348844d21236c56587f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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解题方法
2 . 已知点
,
分别为双曲线C:
(
)的左、右焦点,点
到渐近线的距离为2,过点
的直线l与C的左、右两支曲线分别交于A,B两点,且
,则下列说法正确的为( )
![](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/0e6dcd52515fe86ac3989adef2939466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.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/3bbf7426846fb181e7c6f9e8faca929a.png)
A.![]() |
B.双曲线C的离心率为2 |
C.![]() |
D.![]() |
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3 . 如图,在四棱锥
中,
平面
,四边形
是矩形.
,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/ed420df5-4ddd-4817-bd47-e7e74cfc07bc.png?resizew=152)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6af49df89cfab0004253f26a77b8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1f49222e9f127e6e1f85f7d4d327b8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/ed420df5-4ddd-4817-bd47-e7e74cfc07bc.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
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解题方法
4 . 已知椭圆
(
)的长轴长为4,离心率为
.
(1)求椭圆C的方程;
(2)设点M为椭圆C的上顶点,点
是椭圆C上两个不同的动点(不在y轴上),直线MA,MB的斜率分别为
,
,且
,证明:直线AB过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆C的方程;
(2)设点M为椭圆C的上顶点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4cc51d393a94365f7008de5eae8879.png)
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解题方法
5 . 若椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的左焦点
关于直线
的对称点Q在椭圆上,则椭圆的离心率是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434249d6640b0c1a712d215cf8b83d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0944c99f34ee41bea845303ed15a7d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9b4e4bad5e9c9b83cf86d27d88b7c7.png)
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6 . 若动点
满足方程
,则动点P的轨迹方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde1916b24d96abcd3bfcb852376560d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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7 . 已知⊙C关于直线
对称,且过点
和原点O.
(1)求⊙C的标准方程;
(2)过点
的直线l与⊙C交于A、B两点,且
,求此时直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6274852e643a635e7340efa732edddc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e14bb4ae223d1c251c33daca9649824.png)
(1)求⊙C的标准方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96c1f9f575ea0fd1487c9f4bb7745af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cef568cfe2fc12a4dec11533ada274.png)
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8 . 直线l:
和圆C:
交于A,B两点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb90fbbf3fe28dc2c16eab95e97210a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc4c34d75e14df81f4692e31492a6a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 若直线
与直线
平行,则这两条平行线间的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945792415e4ff7138c2720023ad793ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea45068d6e15301400c384bf02778669.png)
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10 . 直线
的横截距为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04eed461026f69fe9ab2c5dc12af8ac7.png)
A.![]() | B.![]() | C.1 | D.![]() |
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