1 . 已知抛物线
,
为其焦点,抛物线的准线交
轴于点T,直线l交抛物线于A,B两点.
(1)若O为坐标原点,直线l过抛物线焦点,且
,求△AOB的面积;
(2)当直线l与坐标轴不垂直时,若点B关于x轴的对称点在直线AT上,证明直线l过定点,并求出该定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac8a3bffe545af2299cf999d44767206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若O为坐标原点,直线l过抛物线焦点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20452542383f79eab24f520c36e9f8ab.png)
(2)当直线l与坐标轴不垂直时,若点B关于x轴的对称点在直线AT上,证明直线l过定点,并求出该定点的坐标.
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2 . 如图,过抛物线
上一点
,作两条直线分别交抛物线于
,
,若PA与PB的斜率满足
.
![](https://img.xkw.com/dksih/QBM/2018/11/6/2069719384096768/2070928459702272/STEM/1ac8073c-ce6c-43a1-8f83-b92f7cdb2cce.png?resizew=120)
(1)证明:直线AB的斜率为定值,并求出该定值;
(2)若直线AB在y轴上的截距
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39978841bdbe3d4d968557f8048f223.png)
![](https://img.xkw.com/dksih/QBM/2018/11/6/2069719384096768/2070928459702272/STEM/1ac8073c-ce6c-43a1-8f83-b92f7cdb2cce.png?resizew=120)
(1)证明:直线AB的斜率为定值,并求出该定值;
(2)若直线AB在y轴上的截距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48bda099d4ccbffd59338c873b0193e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
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3 . 已知p3+q3=2,求证:p+q≤2.
您最近一年使用:0次
4 . 平面直角坐标系中,
为坐标原点,已知抛物线
的方程为
.
(1)过抛物线
的焦点
且与
轴垂直的直线交曲线
于
、
两点,经过曲线
上任意一点
作
轴的垂线,垂足为
.求证:
;
(2)过点
的直线与抛物线
交于
、
两点且
,
.求抛物线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
(1)过抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/9dcdc56a231f39cf6d7882262d45360f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bdbc62c678a23e5e7fc8c34ffbf257.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/5c0b06dc01c30d13f64be2ac6a1d811e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395303d22ddf21d121c2ab8bacae7f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2018-10-05更新
|
728次组卷
|
4卷引用:【全国市级联考】长春市普通高中2019届高三质量监测(一)理科数学试题
名校
5 . 在直角坐标系
中,曲线
上的点均在曲线
外,且对
上任意一点
,
到直线
的距离等于该点与曲线
上点的距离的最小值.
(1)求动点
的轨迹
的方程;
(2)过点
的直线与曲线
交于不同的两点
、
,过点
的直线与曲线
交于另一点
,且直线
过点
,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae2a2faf8b6b9c4ddc44702b2c00092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e10de2c38bc918ae9e1ce62a5c70099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baca988e757625c577e02752422a72d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
您最近一年使用:0次
2018-05-12更新
|
760次组卷
|
3卷引用:2018届福建省漳州市高三毕业班第三次调研数学(理)试题
14-15高三上·浙江温州·期中
解题方法
6 . 如图所示,在四棱锥P-ABCD中,底面ABCD为菱形,PA⊥平面ABCD,∠ABC=60°,E,F分别是BC,PC的中点.
![](https://img.xkw.com/dksih/QBM/2018/9/8/2027824454631424/2045581426794496/STEM/873e917bc33842f0a6775ac505305a13.png?resizew=117)
(1)证明:AE⊥PD;
(2)若AB=2,PA=2,求二面角E-AF-C的余弦值.
![](https://img.xkw.com/dksih/QBM/2018/9/8/2027824454631424/2045581426794496/STEM/873e917bc33842f0a6775ac505305a13.png?resizew=117)
(1)证明:AE⊥PD;
(2)若AB=2,PA=2,求二面角E-AF-C的余弦值.
您最近一年使用:0次
2018-10-03更新
|
1036次组卷
|
6卷引用:2015-2016学年青海省西宁十四中高二期中考试数学试卷
7 . 如图所示,在三棱台
中,
和
均为等边三角形,四边形
为直角梯形,
平面
,
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2018/4/29/1934587041603584/1936625919131648/STEM/9f4e7db7df334c888d101b64eedb7c0d.png?resizew=161)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c3135fa20c32d04a270750f77c1f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a63bb21aaaa06f5fb6ccf0c81562dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dc038dc1a9108f6387459a16f4b379.png)
![](https://img.xkw.com/dksih/QBM/2018/4/29/1934587041603584/1936625919131648/STEM/9f4e7db7df334c888d101b64eedb7c0d.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9bcc8631d561f72f6898f035640758.png)
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8 . 设圆
(圆心为
):
,圆
圆心为
:
,定点
,
为直线
上异于
的一点,
和
分别为圆
、圆
上异于
的点,满足
,
,直线
和
交于点
,记
的轨迹为曲线
.
(1) 求证: 曲线
为椭圆(或椭圆的一部分),并写出
的方程;
(2) 设
的上顶点为
,过点
的直线与椭圆交于
两点(异于
),求证: 直线
和
的斜率之和为定值,并求出这个定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcb9cbdc9f4bc2c88862bec122a8c635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/693a91d4dab6aa1dc59aba9b575ac5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6dbb619c8ffe82d26dde81775f628f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf78884162de0135983aee6a809ef16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f40381ef92867590ee35630e5608acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d2b01f86fb5a373af6b089cf3d891b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc01cab237e7c2db7d299dee3bd0939.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78b65360dc31ac3a2a842170078ff40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f69f26d0ddf27ab715880f818df750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07a85a76f4481aaf65ef97c490e3a152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1) 求证: 曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2) 设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47be92837941fbd843bb400de428d6b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3aa3ce0327a2f5d4999b99fb612bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c6eb5bb1587107bb7a15e0ece60ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b4d8e4e47b2e4b394151493ca8e20d.png)
您最近一年使用:0次
9 . 已知圆
,圆
,圆
与圆
都相内切.
(1)求圆心
的轨迹
的方程;
(2)若点
是轨迹
上的一点,求证:
中,
的外角平分线与曲线
相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8284506de3f837db03d167c73c4af43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e1d873fa778459919c2bfa5420cd961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880248fa1259b2600a87f09a61287d44.png)
(1)求圆心
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/939a56d6f1740effca4c85524bcafaaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5168574ab233e214ad312e30840ae3e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
名校
10 . 如图,在直三棱柱
中,
分别是
的中点.
(1)求证:
平面
;
(2)若三棱柱
的体积为4,求异面直线
与
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/703cb68fb9a677140c6c135777d09a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2743e10dd8bce468d1d397b3e9a550d3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://img.xkw.com/dksih/QBM/2018/4/14/1924133125406720/1925801981247488/STEM/274547e4cffd4946b7341aedc2742945.png?resizew=118)
您最近一年使用:0次
2018-04-17更新
|
552次组卷
|
3卷引用:2018年普通高校招生全国卷 I A 信息卷 高三文科数学(二)