名校
1 . 已知抛物线C:x2=2py(p>0)的焦点为F,抛物线上一点A的横坐标为x1(x1>0),过点A作抛物线C的切线l1交x轴于点D,交y轴于点Q,当|FD|=2时,∠AFD=60°.
(1)求证:FD垂直平分AQ,并求出抛物线C的方程;
(2)若B位于y轴左侧的抛物线C上,过点B作抛物线C的切线l2交直线l1于点P,AB交y轴于点(0,m),若∠APB为锐角,求m的取值范围.
(1)求证:FD垂直平分AQ,并求出抛物线C的方程;
(2)若B位于y轴左侧的抛物线C上,过点B作抛物线C的切线l2交直线l1于点P,AB交y轴于点(0,m),若∠APB为锐角,求m的取值范围.
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2016-12-04更新
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2卷引用:青海省西宁市城西区青海湟川中学2022-2023学年高三上学期12月月考文科数学B试题
名校
2 . 在等腰
中,
,腰长为2,
、
分别是边
、
的中点,将
沿
翻折,得到四棱锥
,且
为棱
中点,
.
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203473345437696/2203577458155520/STEM/2b5ca5f7587f4b5da68fee1f62db2f96.png?resizew=268)
(1)求证:
平面
;
(2)在线段
上是否存在一点
,使得
平面
?若存在,求二面角
的余弦值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315f2329bfd431a843f4a4d33712ffa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa53abf5662cdd7b9943be264400b40.png)
![](https://img.xkw.com/dksih/QBM/2019/5/14/2203473345437696/2203577458155520/STEM/2b5ca5f7587f4b5da68fee1f62db2f96.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb49d869110f27140f5c1934143db2e.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafa398cc6b6079883e7ad153eb62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce9e1664f888e70b0bec872178dccd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18592ae87b1d30faba1a0b9b5e7542e1.png)
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2016-12-03更新
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776次组卷
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4卷引用:【全国百强校】青海省西宁市第四高级中学、第五中学、第十四中学三校2019届高三4月联考数学(理)试题
3 . 如图所示,在所有棱长都为
的三棱柱
中,侧棱
,
点为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2016/3/10/1572530990374912/1572530996379648/STEM/0b6a82cb17fa469099137c3539e7cc56.png)
(1)求证:
∥平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b55b692c0d62711e621c1cc40d6b4d90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/3/10/1572530990374912/1572530996379648/STEM/0b6a82cb17fa469099137c3539e7cc56.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640049e67518a7f8fb90ed0d6dda45bc.png)
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2016-12-03更新
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4卷引用:2016届青海西宁五中四中十四中高三下联考数学(文)试卷
2014·山西忻州·一模
4 . 如图五面体中,四边形
为矩形,
,四边形
为梯形,
且
,
.
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/442f29fe8a024ae48c6cf1d9885ab612.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
;
(2)求此五面体的体积.
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/e0d18a00bfe7490aa48eb9fd21a342f1.png)
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/911f1cf20ed54b79b9c1856d20b2bb3a.png)
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/50ed0a2fe4e94dcba58179ac488415e6.png)
且
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/70e7b928d07b42a5b1bd09eb1870be7b.png)
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/a94fa091d11d45a2a3f78fd2bdca65d6.png)
![](https://img.xkw.com/dksih/QBM/2014/10/14/1571876040548352/1571876046422016/STEM/442f29fe8a024ae48c6cf1d9885ab612.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30baeef897f935f9cb03a29ad61a5cd9.png)
(2)求此五面体的体积.
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10-11高三下·吉林·期中
5 . 已知极坐标系的极点与直角坐标系的原点重合, 极轴与直角坐标系的
轴的正半轴重合, 设点
为坐标原点, 直线
(参数
)与曲线
的极坐标方程为
.
(1)求直线
与曲线
的普通方程;
(2)设直线
与曲线
相交于
两点, 证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12ee9db89a024d20d7102f3fb5d79498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995ec593baa4ef50b6d87c78380953d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8fd2384710de82227484493cbfc1c78.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404f1e46e5448b49bc5eaa763f584d71.png)
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2016-12-04更新
|
946次组卷
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6卷引用:青海省西宁市海湖中学2023-2024学年高三年级上学期开学考试(理科)数学试题
青海省西宁市海湖中学2023-2024学年高三年级上学期开学考试(理科)数学试题(已下线)2011届吉林省普通中学高中毕业班下学期期中考试数学理卷(已下线)2011届吉林省吉林市普通中学高三下学期期中考试数学理卷(已下线)2012届新疆克拉玛依市实验中学高三4月模拟一理科数学试卷2016届湖南省郴州市高三第四次教学质量检测理科数学试卷2016届湖南省郴州市高三第四次教学质量检测文科数学试卷
11-12高三上·福建泉州·期中
名校
6 . 已知椭圆
的离心率为
,短轴的一个端点到右焦点的距离为2,
(1)试求椭圆
的方程;
(2)若斜率为
的直线
与椭圆
交于
、
两点,点
为椭圆
上一点,记直线
的斜率为
,直线
的斜率为
,试问:
是否为定值?请证明你的结论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://img.xkw.com/dksih/QBM/2011/12/6/1577552914767872/1577552915365888/STEM/78144a55bc3141ac911c796ec5a48cf7.png)
(1)试求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3be737795dfc65e07b215277af677a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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2016-12-01更新
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11卷引用:2020届青海省西宁市六校(沈那、昆仑、总寨、海湖、21中、三中)高三上学期期末数学(文)试题
2020届青海省西宁市六校(沈那、昆仑、总寨、海湖、21中、三中)高三上学期期末数学(文)试题(已下线)2011—2012学年福建省泉州市一中高三上学期期中文科数学试卷(已下线)2012届福建省泉州四校高三第二次联考考试文科数学(已下线)2012届福建省晋江市四校高三第二次联合考试文科数学试卷甘肃省天水市第一中学2019-2020学年高三上学期12月月考数学(理)试题甘肃省天水市第一中学2019-2020学年高三上学期12月月考数学(文)试题甘肃省天水市一中2019-2020学年高三上学期第三阶段考试数学(理)试题甘肃省天水市一中2019-2020学年高三上学期第三阶段考试数学(文)试题西藏拉萨那曲第二高级中学2021届高三上学期第二次月考数学(文)试题西藏拉萨那曲第二高级中学2021届高三上学期第二次月考数学(理)试题甘肃省嘉谷关市第一中学2020-2021学年高三上学期一模考试数学(理)试题
解题方法
7 . 已知函数
.
(1)若函数
在
上单调递增,求
的取值范围;
(2)若函数
的两个零点分别是
且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554604e4c3bb9fe9e186a43d3e0d5575.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b222b256b37f83fa24a3a4b6527f58d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4c51e13a3011722c8340321ad5a7a5.png)
您最近一年使用:0次
8 . 已知函数
.
(1)若
,求曲线
在
处的切线方程;
(2)当
,
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379164b4c4bf35f19fc964dcfcb7ab02.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c3319647314c3b6d82958a909acd2a.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c87874458fabe50aff5e19d586d5d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ee71d55403212e8e1613b18ad38196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7323204db5e62c90cd83b26ff1b66a.png)
您最近一年使用:0次
2023-11-27更新
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5卷引用:青海、宁夏部分名校2024届高三上学期调研考试文科数学试题