1 . 已知椭圆
的离心率为
,点
是椭圆
的左、右焦点,过定点
的动直线
与椭圆
交于
两点,当
共线时,
的周长为
.
(1)求椭圆
的标准方程;
(2)设弦
的中点为
,点
在
轴上,且满足
,试求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab0fe9059acc47d2447576e1260c4622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aac4ec5701547d4c4de88a03e584f66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b5769c9bade2babbb9575b7fca78ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee2b562343a3c84b8fdd9f9bca1b5e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5377d1e7d64be9da71d22c4eaa772870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/736590304a98a696eab763d948ed05c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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2 . 全国人大常委会会议于 2015年12月27日通过了关于修改人口与计划生育法的决定, “全面二孩”从2016年元旦起开始实施,
市妇联为了解该市市民对“全面二孩”政策的态度,随机抽取了男性市民
人、女性市民
人进行调查, 得到以下的
列联表:
(1)根据以上数据,能否有
的把握认为
市市民“支持全面二孩”与“性别”有关?
(2)现从持“支持”态度的市民中再按分层抽样的方法选出
人发放礼品,分别求所抽取的
人中男
性市民和女性市民的人数;
(3) 从(2)题中所选的
人中, 再随机抽出
人进行长期跟踪调查, 试求恰好选到一男一女的概率.
参考公式:
,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa86faa9bfef703aead8c2606684dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
支持 | 反对 | 合计 | |
男性 | ![]() | ![]() | ![]() |
女性 | ![]() | ![]() | ![]() |
合计 | ![]() | ![]() | ![]() |
(1)根据以上数据,能否有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1900955145de5c6dfefaf3376937202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)现从持“支持”态度的市民中再按分层抽样的方法选出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
性市民和女性市民的人数;
(3) 从(2)题中所选的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06eb54a55eb8b198f0a18886977aa11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
参考数据:
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
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3 . 如图,在直三棱柱
中,底面
是等腰三角形,且斜边
,侧棱
,点
为
的中点,点
在线段
上,
为实数).
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573018779394048/1573018785300480/STEM/3c16949f07c64a72942b7ec44400a788.png)
(1)求证:不论
取何值时,恒有
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30073ec07b5fb62af9a87b6b57b4c7b.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573018779394048/1573018785300480/STEM/3c16949f07c64a72942b7ec44400a788.png)
(1)求证:不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5fffd330dd6b9241659d790bd2a7fb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/809a49ebe6b23a3bde5bc78c87e5fef8.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32c2d251e2a43c81e5139f6284072d.png)
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4 . 数列
满足
,记
,则数列
前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa27de69c929b0bbd70c2fa227e312d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5fed58bc14caf35f081c2a7cd304091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db850e54a545598c4ea061aa6aed9a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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5 . 某几何体的三视图如图所示,该几何体的体积为________ .
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573018779394048/1573018785218560/STEM/b3b9dbfa-6542-41f8-b1bc-1cc314514c86.png)
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6 . 若实数
满足约束条件
,则
的最小值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/247c66fa7fc6508e258581fbff9b423b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a311167ece8f398964da7e13c3a8a278.png)
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7 . 已知向量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67142c672f4ce0b994c1d7d444a2b47.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cccc6570dda37ea8a14540dcef228829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6433f98b702100f5fba0844361be7051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67142c672f4ce0b994c1d7d444a2b47.png)
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8 . 已知函数
,若方程
有四个不同的实数根
(其中
),则
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2d91d8b6fbc5cba09b5bf489b378a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5146bc9a97f4702752c969ee2ff9f4da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b57db116a7c7a7f575d1f685c236f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944732667fe1cf6ad5b89a8c94df4b23.png)
A.![]() | B.![]() | C.![]() | D.不确定 |
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9 . 抛物线
的准线与
轴交于点
,焦点为点
,点
是抛物线
上的任意一点,令
,则
的最大值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/262f2ae4b735e4d8e2972bd07909f4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 将函数
的图象向右平
个单位,再把所有的点的横坐标缩短到原来的
倍(纵坐标不变),得到函数
的图象,则函数
的图象的一条对称轴为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac36e9cf9e651338a35cc6d9520c166b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdab625e32e38d1c72c901cece0e147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
A.直线![]() | B.直线![]() | C.直线![]() | D.直线![]() |
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