1 . 设抛物线
的焦点为
,过点
的直线
与抛物线交于
两点,与
轴的负半轴交于
点,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab39e003dd4544e2ba8a81eac2349b5.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6614916203fe0146d6797138da3db4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a8e65100239e2132262a07753e3a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab39e003dd4544e2ba8a81eac2349b5.png)
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解题方法
2 . 设
,当
变化时
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd54a4134aef3f68a9c068ee4dade284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf27e0ac992edacdf11c649113e9445e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
3 . 已知抛物线
的焦点为
,动点
在
上,点
与点
关于直线
对称,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6ce39c72b38fa1a2b3275188b27689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db0a1cbf7b0ed76c443b953af8734d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c19ec66bbb4cefd58395ed4f3e54979.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 如图,在平面直角坐标系中,
和
是
轴上关于原点对称的两个点,过点
倾斜角为
的直线
与抛物线
交于
两点,且
.
为
的焦点,求证:
;
(2)过点
作
轴的垂线,垂足为
,若
,求直线
的方程.
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08136e6bc876f29a13d1204d9d621db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea0b6471289760543596f5f45aa43ae.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14cc1572ca21da2e3271484f127a5094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2024-06-03更新
|
515次组卷
|
3卷引用:山西省临汾市2024届高三下学期考前适应性训练(三)数学试题
解题方法
5 . 已知抛物线
:
,
为
上一点,
,
,当
最小时,
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0261104a7c308433a0c0508ff20ea29a.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/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42ba0afbfc0d511a7e27a69a687525f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255b03f01d1039f11f5a3ba36bce5789.png)
A.![]() | B.![]() | C.![]() | D.18 |
您最近一年使用:0次
名校
解题方法
6 . 已知抛物线
,F为C的焦点,P,Q为其准线上的两个动点,且
.若线段PF,QF分别交C于点A,B,记
的面积为
的面积为
,当
时,直线AB的方程为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9ca9ea5c24e205bf7e26d1f5aa49fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bd629c73479ee41ad4546c61ce2f59c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad79b1a9ca79953af668490f8a5a0c0d.png)
您最近一年使用:0次
7 . 已知抛物线
的焦点为
为抛物线
上的任意三点(异于坐标原点
),
,且
,则下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2786fda111d2f8efcb6dc58aa0cbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ba11c7099e4fd590723a0e22aa4bfce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13f9134b42ec02fb4f1290279d0781f.png)
A.![]() |
B.若![]() ![]() |
C.设![]() ![]() ![]() ![]() |
D.若直线![]() ![]() ![]() |
您最近一年使用:0次
2024-04-13更新
|
1136次组卷
|
3卷引用:2024届山西省平遥县第二中学校高三冲刺调研押题卷数学(三)
名校
8 . 吉林雾淞大桥,位于吉林市松花江上,连接雾淞高架桥,西起松江东路,东至滨江东路.雾淞大桥是吉林市第一座自锚式混凝土悬索桥,两主塔左、右两边悬索的形状均为抛物线(设该抛物线的焦点到准线的距离为米)的一部分,左:右两边的悬索各连接着29根吊索,且同一边的相邻两根吊索之间的距离均为
米(将每根吊索视为线段).已知最中间的吊索的长度(即图中点
到桥面的距离)为
米,则最靠近前主塔的吊索的长度(即图中点
到桥面的距离)为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-02-14更新
|
866次组卷
|
3卷引用:山西省晋城市2024届高三一模数学试题
解题方法
9 . 已知抛物线C的顶点为坐标原点O,焦点在x轴上,直线l:
交C于M,Q两点,且
.
(1)求C的方程;
(2)若点P是C的准线上的一点,过点P作C的两条切线PA,PB,其中A,B为切点,求点O到直线AB的距离的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b223e82b7351ed5a7e7d1613e2e3639c.png)
(1)求C的方程;
(2)若点P是C的准线上的一点,过点P作C的两条切线PA,PB,其中A,B为切点,求点O到直线AB的距离的最大值.
您最近一年使用:0次
名校
解题方法
10 . 已知O为坐标原点,F为曲线
的焦点,点A(不与O重合)在C上,且
,则直线
斜率的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf92a1ba410263d4f68b7e0432b19aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26bb3a0cefd6d2c7e136a699d01d1985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
您最近一年使用:0次
2023-12-18更新
|
515次组卷
|
3卷引用:山西省临汾市同盛实验中学2024届高三核心模拟(中)数学试题(四)