1 . 如图所示,在四棱锥
中,
平面ABCD,四边形ABCD是矩形,且
,
,E是棱BC上的动点,F是线段PE的中点.
平面ADF;
(2)若直线DE与平面ADF所成的角为30°,求EC的长.
![](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/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
(2)若直线DE与平面ADF所成的角为30°,求EC的长.
您最近一年使用:0次
2 . 如图,四棱锥
中,
平面
,
,且
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/c599b562-d198-4f15-b774-03251efaa82e.png?resizew=159)
(1)求证:
平面
;
(2)求
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/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c2c003b0954b99d2a1a20ce2c4a3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/c599b562-d198-4f15-b774-03251efaa82e.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
解题方法
3 . 已知函数
.
(1)若函数
的最大值为0,求
的值;
(2)已知直线
(
),证明有且仅有两个不同的实数
,使得直线
与曲线
,
相切,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4151a64e265e68da869158181c84ff95.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b43b2d0c7279cbff252e4a16da10e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b244a88c2fbf268ba5438b73531dd2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1d5e94ab38981bdff33a251d6fd73f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0638e16ba586ab5c531ac26b0dee3a3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7152513c508baee498765e3802237bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fb333ff90c0461aa7210c6c212a709.png)
您最近一年使用:0次
解题方法
4 . 设正项等比数列
,
,且
的等差中项为
.若数列
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72009607cefc110633e624b222c8781a.png)
.
(1)求数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d941370dd732aaf20d56797bc1fae0dd.png)
的通项公式;
(2)数列
前n项和为
,若不等式
对一切
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4671fb7d933ef29ed2ab78d6d54dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe61d313eeca8ba47478a9de40540db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd7dab04da0a263753bd13c8a6c5e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72009607cefc110633e624b222c8781a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f3ef9068c15d522018a6e2f01b3778.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d941370dd732aaf20d56797bc1fae0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6452492783a2d3618424f8cf73bd7781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f841a990c38b0a56ab9b7cf4b5cc5e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
5 . 已知函数
,
.
(1)求函数
在
单调递增区间;
(2)若函数
为奇函数,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a9831be41264820e02234cb5a0e421f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ff8dca35b759d3051b62badd7d76bc.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098460baa335e3ab4481b4dd8f304227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a771f2e80c8a29ed2ebd76498b0f49.png)
您最近一年使用:0次
6 .
是抛物线
上的动点,过点
作圆
的两条切线
交
轴于
两点.
![](https://img.xkw.com/dksih/QBM/2021/10/24/2841795541712896/2845208221401088/STEM/f74264c0-680e-484b-ac09-02765ad9ac5f.png?resizew=317)
(1)若两条切线
的斜率乘积为1,求
点的纵坐标;
(2)求当
时,
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ee1aeafdfc0aa7ae03e7336c81b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/2021/10/24/2841795541712896/2845208221401088/STEM/f74264c0-680e-484b-ac09-02765ad9ac5f.png?resizew=317)
(1)若两条切线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9e8fc7ae421f844c3d998d2212cf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
您最近一年使用:0次
名校
解题方法
7 . 在平面直角坐标系
中,已知椭圆
:
的离心率为
,短轴长为2.
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716177558085632/2718689276895232/STEM/feed4877-2128-4149-993b-06cdf9cfebe4.png?resizew=293)
(1)求椭圆
的标准方程;
(2)设
为椭圆上顶点,点
是椭圆
上异于顶点的任意一点,直线
交
轴于点
,点
与点
关于
轴对称,直线
交
轴于点
.问:在
轴的正半轴上是否存在点
,使得
?若存在,求点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716177558085632/2718689276895232/STEM/feed4877-2128-4149-993b-06cdf9cfebe4.png?resizew=293)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12a125982972479eec216e903aad3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
您最近一年使用:0次
2021-05-11更新
|
1112次组卷
|
4卷引用:2019年浙江省普通高中学业水平名师预测卷(三)
2019年浙江省普通高中学业水平名师预测卷(三)天津市耀华中学2021届高三下学期一模数学试题天津市第四十七中学2021-2022学年高三上学期第二次月考数学试题(已下线)考点巩固卷20 椭圆方程及其性质(十大考点)
名校
解题方法
8 . 已知双曲线C的中心在原点,抛物线
的焦点是双曲线C的一个焦点,且双曲线经过点
,又知直线
与双曲线C相交于A、B两点.
(1)求双曲线C的方程;
(2)若
,求实数k值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71a67c221c7777793804c6b7026512d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dccc5720967ee3edce0174255e8ed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
(1)求双曲线C的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bfe4da6f357e55927d25d9d27ea8717.png)
您最近一年使用:0次
2021-04-20更新
|
722次组卷
|
8卷引用:2019年浙江省普通高中学业水平名校模拟卷(七)
2019年浙江省普通高中学业水平名校模拟卷(七)(已下线)专题2.5 圆锥曲线的共同性质-2020-2021学年高二数学课时同步练(苏教版选修1-1)黑龙江省鹤岗市绥滨县第一中学2020-2021学年高二上学期期末考试数学(文)试题四川省内江市威远中学2020-2021学年高二下学期期中考试数学(文)试题甘肃省金昌市永昌县第一高级中学2020-2021学年高二下学期期中数学(理)试题江苏省南通市平潮高级高中2020-2021学年高二上学期11月学情检测数学试题(已下线)第三章 圆锥曲线的方程 3.3抛物线-2021-2022学年高二数学上学期同步课堂习题测试(人教A版2019选择性必修第一册)(已下线)3.3.1 (整合练)抛物线及其标准方程-2021-2022学年高二数学考点同步解读与训练(人教A版2019选择性必修第一册)
名校
解题方法
9 . 如图,
分别是椭圆
:
+
=1(
)的左、右焦点,
是椭圆
的顶点,
是直线
与椭圆
的另一个交点,
.
(1)求椭圆
的离心率;
(2)已知
的面积为
,求a,b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7355be4fcbc3130a5951364a3be76d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268413295580cfda0755ab458b36b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/e86dbcf83cd5d3421b3eed7be7dab32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74064c3fa84f604f6636f6bbf778bdc1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/4955c2a5-db97-4ebd-ac50-54437ea73682.png?resizew=160)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bf0cf2f9b056030f17dfba06f62b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd1766294dc48dd810a6ab4840703a0.png)
您最近一年使用:0次
2020-09-21更新
|
690次组卷
|
16卷引用:2019年浙江省普通高中学业水平名校模拟卷(六)
2019年浙江省普通高中学业水平名校模拟卷(六)广东省佛山市第一中学2019-2020学年高二上学期第二次段考数学试题(已下线)【新东方】绍兴qw103陕西省渭南市大荔县2019-2020学年高二上学期期末数学(理)试题(已下线)专题26 椭圆-十年(2011-2020)高考真题数学分项广西南宁市上林县中学2020-2021学年高二上学期期末考试数学(文)试题宁夏吴忠中学2020-2021学年高二下学期期末数学(文)试题(已下线)检测(二)-【专题突破】2021-2022学年高二数学之圆锥曲线与方程(人教A版选修1-1)江苏省淮安市淮安区2020-2021学年高二上学期期中数学试题福建省南安市第三中学2021-2022学年高二10月检测数学试题(已下线)专题42 盘点圆锥曲线中的面积问题——备战2022年高考数学二轮复习常考点专题突破江苏省扬州市江都区、仪征市2021-2022学年高二上学期12月联考数学试题陕西省西安市长安区第一中学2022-2023学年高二上学期第一次质量检测文科数学试题北京市第一零九中学2023届高三高考冲刺数学试题广东省深圳市盐田高级中学2021-2022学年高二上学期期中数学试题江苏省镇江市扬中市第二高级中学2023-2024学年高二上学期期中数学试题
解题方法
10 . 设
,已知函数
.
(Ⅰ)当
时,判断函数
的奇偶性;
(Ⅱ)若
恒成立,求
的取值范围;
(Ⅲ)设
,若关于
的方程
有实数解,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64663000c9c761e53f018a9b54cd468.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17dee19e20ec748f8003a201f1d32539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd0914dc4d4c7f75710ff460a286fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f3dc4126f14210cd5d7ce715547053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
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