名校
解题方法
1 . 假设视网膜为一个平面,光在空气中不折射,眼球的成像原理为小孔成像. 思考如下成像原理: 如图,地面内有圆
,其圆心在线段
上,且与线段
交于不与
重合的点
,
地面,且
,
点为人眼所在处,视网膜平面与直线
垂直. 过
点作平面
平行于视网膜平面. 科学家已经证明,这种情况下圆
上任意一点到
点的直线与平面
交点的轨迹(令为曲线
)为椭圆或圆,且由于小孔成像,曲线
与圆
在视网膜平面上的影像是相似的,则当视网膜平面上的圆
的影像为圆时,圆
的半径
为____________ . 当圆
的半径
满足
时,视网膜平面上的圆
的影像的离心率的取值范围为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137d33c8575602cb3480ba3825dece9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7442b64b37f685bc3ae88ff450c1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e92e4810c9461c39fae1acde95e489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3dc6893e52bbca0d011ac46845334d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
您最近一年使用:0次
2024-05-09更新
|
93次组卷
|
2卷引用:四川省成都市实验外国语学校2023-2024学年高二上学期期末能力测评数学试题
23-24高二上·全国·课后作业
名校
解题方法
2 . 已知圆系
,圆
过
轴上的定点
,线段
是圆
在
轴上截得的弦,设
,
.对于下列命题:
①不论
取何实数,圆心
始终落在曲线
上;
②不论
取何实数,弦
的长为定值1;
③不论
取何实数,圆系
的所有圆都与直线
相切;
④式子
的取值范围是
.
其中真命题的序号是________ (把所有真命题的序号都填上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44040d39dfe54c07501b97b31e35080a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66603dd2d326d41dd3da242c6373591b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd74a50518d45904e4295e95ece5ba3d.png)
①不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8953ded144195804384dcb494d5e2a.png)
②不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
③不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f3fa679bb55ded25a9b72a8e788cb1.png)
④式子
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c26ee0f01990cd336dc2452014ea0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49fac8ba3fd4c62ec08ed60a2fe44b2.png)
其中真命题的序号是
您最近一年使用:0次
名校
3 . 剪纸是一种用剪刀或刻刀在纸上剪刻花纹,用于装点生活或配合其他民俗活动的中国民间艺术.其传承赓续的视觉形象和造型格式,蕴涵了丰富的文化历史信息,表达了广大民众的社会认知、道德观念、实践经验、生活理想和审美情趣,具有认知、教化、表意、抒情、娱乐、交往等多重社会价值.现有如图所示剪纸图案,其花纹中就隐含方程为
的曲线C(称为星形线),则曲线C的内切圆半径为__________ ;以曲线C上点
为切点的直线被坐标轴截得的线段长等于__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08bc1b7db92cb8d877c90ddafb3b3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc34e72b0801752d88ec762af4e0814f.png)
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2024-03-14更新
|
577次组卷
|
5卷引用:安徽省安庆市2024届高三模拟考试(二模)数学试题
安徽省安庆市2024届高三模拟考试(二模)数学试题(已下线)【一题多变】曲线方程 变形化简(已下线)专题8 函数新定义问题【讲】(压轴题大全)(已下线)模块三 易错点3 不会从情境题中抽象出数学图形广东省广州市执信中学2024届高三下学期教学情况检测(三)数学试题
2024高三下·全国·专题练习
4 . 关于曲线
有以下五个结论:
①当
时,曲线C表示圆心为
,半径为
的圆;
②当
,
时,过点
向曲线C作切线,切点为A,B,则直线AB的方程为
;
③当
,
时,过点
向曲线C作切线,则切线方程为
;
④当
时,曲线C表示圆心在直线
上的圆系,且这些圆的公切线方程为
或
;
⑤当
,
时,直线
与曲线C表示的圆相离.
以上正确结论的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983416abb2a19329feee784025961f1a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/484121f8076509e579f91dd919e4632a.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc2d3df37e73a8abea815f37dbb3fff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4681073487d89441a8db549f4187dda8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e729c58c343ef3cebb8bd720278c26ed.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d694b4de9f0bef15f2917a4ed214e01c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9891da64b7a4a2f83f2af4d4c313246e.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00e8c8fd6d9c4ed8cf35504db1918b4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a10732055a4228ab2b1a0f1bb16b67.png)
⑤当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1578a4b2d61c2b65532f5dcb25003.png)
以上正确结论的序号为
您最近一年使用:0次
5 . 已知点
,定义
为
的“镜像距离”.若点
在曲线
上,且
的最小值为2,则实数
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07dcd9bfd79cb83eef32ffecb3660d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5aded785faf38e963d402f622be4092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ebfda261c4a27e1fa2ee5fc6d4bdfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 将“用一条线段联结两个点”称为一次操作,把操作得到的线段称为“边”.若单位圆上
个颜色不相同且位置固定的点经过
次操作后,从任意一点出发,沿着边可以到达其他任意点,就称这n个点和k条边所构成的图形满足“条件
”,并将所有满足“条件
”的图形个数记为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33489e1a3bd3857a818bb0c6296da53a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b68080f1b8f75112406c0c5a8a0a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33489e1a3bd3857a818bb0c6296da53a.png)
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2024-03-03更新
|
1229次组卷
|
7卷引用:江苏省泰州市2024届高三2月调研测试数学试题
江苏省泰州市2024届高三2月调研测试数学试题江苏省常州市金坛区2024届高三下学期调研测试(零模)数学试题江苏省南通市海安高级中学2023-2024学年高二下学期阶段检测(一)数学试题(已下线)6.2.3组合-6.2.4组合数——课时作业(提升版)单元测试B卷——第六章 计数原理(已下线)压轴题08计数原理、二项式定理、概率统计压轴题6题型汇总广西壮族自治区贵港市2024届高三下学期模拟预测数学试题
7 .
表示以点
为中心的椭圆,如图所示,
为椭圆C:
的左焦点,Q为直线
上的一点,P为椭圆C上的一点,以
为边作正方形
(F,P,A,B按逆时针排列),当P在椭圆上运动时,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc5d275721db46e39e5b23a7f2b64268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9799b1b1f49ef15916b0018547564590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caa04eb7cae40ce5e89da590b9cdb75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134dde7006742eba3252cb11fe959abe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f739b07f992bce672aef2fc48b4b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857e804aac2f81757178d237485299fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b65ea04098e8d2809d8163f27d49860c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/cf3db5f3-5935-4e04-8948-1081f9a525e9.png?resizew=187)
您最近一年使用:0次
8 . 已知点A为抛物线
上一点(点A在第一象限),点F为抛物线的焦点,准线为l,线段AF的中垂线交准线l于点D,交x轴于点E(D、E在AF的两侧),四边形
为菱形,若点P、Q分别在边DA、EA上,
,
,若
则
的最小值为______ ,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1074ae4cfaa6c7ab2eabe04bf97513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7112901e241c4db02f538795d1b79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8b5ad14031c353573710741dc68549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bdbdec26c6aa6565eef79515056a036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ef5824baf830ec04377a49df11513c.png)
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9 . 中国传统数学中开方运算暗含着迭代法,清代数学家夏鸾翔在其著作《少广缒凿》中用迭代法给出一个“开平方捷术”,用符号表示为:已知正实数
,取一正数
作为
的第一个近似值,定义
,则
是
的一列近似值.当
时,给出下列四个结论:①
;②
;③
,
;④
,
.其中所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dde645fdd5795b4194e50d6885bf17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e40ebe5a203db35552e27bf3f079f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da18ad56af5e38b1a5b73f44ba198fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55dde645fdd5795b4194e50d6885bf17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede0f7cac4530e0ed4799a8192283888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835faec9f80596430d7352dcacde9589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c3401c74f3b70fd95a069b6abcf717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3febfa17c874de45558534cc8bbe8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e377f675489078f2fec21a6b5cce0c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c68b253787b7980d259a243ee42ecfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad46a14425d9c75b82b4e1342c57949e.png)
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10 . 如图,正方形
的边长为1,连接
各边的中点得到正方形
,连接正方形
各边的中点得到正方形
,依此方法一直进行下去.记
为正方形
的面积,
为正方形
的面积,
为正方形
的面积,……..
为
的前
项和.给出下列四个结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/c953b28a-410f-4e09-8ec2-bc4ac20a0ddb.png?resizew=142)
①存在常数
,使得
恒成立;②存在正整数
,当
时,
;③存在常数
,使得
恒成立;④存在正整数
,当
时,
其中所有正确结论的序号是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64a8012195f63ecbb610ba810a806103.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
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3卷引用:北京市东城区2023-2024学年高二上学期期末统一检测数学试卷
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