1 . 设实数x1,x2,…,x2018满足
(n=1,2,…,2016)和
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f46ed833f139414b90b1b5bc81dc41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e28b8686885b2c91d3e39ee526143330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502e9dd0ae29252338e4f50b449c0e20.png)
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2 . 设
,且对任意实数b均有
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980a8c4eb822aeb591ceacfe8a7aaa11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26cc284418806f80687003951faa8fef.png)
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3 . 如图所示将同心圆环均匀分成n(
)格.在内环中固定数字1~n.问能否将数字1~n填入外环格内,使得外环旋转任意格后有且仅有一个格中内外环的数字相同?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1534b035eca39010118a83486de8904.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/e1514f5c-b061-4829-9b51-24d7646d2fce.png?resizew=111)
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4 . 已知动直线l与圆O:
相切,与椭圆
相交于不同的两点A,B.求原点到AB的中垂线的最大距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172a81d7de35ecdd0afbfc696c4d864c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e84d444be94a2e6554c5b581468792b.png)
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5 . 将2n(
)个不同整数分成两组a1,a2,…,an;b1,b2,…,bn.证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a024f71df4b4c4c42a34ebdfa4dbf1.png)
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6 . 我国古代数学名著《九章算术》中记载的“刍甍”是底面为矩形,顶部只有一条棱的五面体.如图,五面体
是一个“刍甍”,四边形
为矩形,
与
都是正三角形,
,
.
![](https://img.xkw.com/dksih/QBM/2018/12/9/2093247311503360/2093686354321408/STEM/4eec7dd95df640599946526bd828a835.png?resizew=317)
求证:
面
;
求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019c0405370c673e37b46c066eba839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c85022048334bb883119115330b45a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae027044287787834a7f69aef58deef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d527d4795ece4a5756d1cf8dba31e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abcdcc84bdbd118d07b19ac61611e86.png)
![](https://img.xkw.com/dksih/QBM/2018/12/9/2093247311503360/2093686354321408/STEM/4eec7dd95df640599946526bd828a835.png?resizew=317)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab1cf5f4e0b36edf3b9a064dc75828b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09446528b12dd384c6828e1ef1c70e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8120f2eeb724c756b5f84a14c6df527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6d456e2adab93eabc931b3227bb79f.png)
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2018-12-10更新
|
358次组卷
|
3卷引用:2022年浙江省温州市摇篮杯高一数学竞赛试题
7 . 设函数
(
、
).对于任意的
,若
、
满足
,
,则
.求正实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6a4e0cfb9ccdcf2b42ec42cd7326c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c36b234ba460321e811de1729eadd4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aacfc97d3ea572ea5f980851f15299cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca419980fe195feaf057c23ee88c262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897d1be14f34025af9dcbb4fc184c025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f348a0b693a24c92a2bebf7fa0dba2a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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8 . 设正整数
,对
格点链中的
个结点用红(
)、黄(
)、蓝(
)三种颜色染色,左右端点中的三个结点已经染好色,如图.若对剩余的
个结点,要求每个结点恰染一种颜色,相邻结点异色,求不同的染色方法数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44962bb22ed233475aee8a197ee34cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629455b181f187fe9b0edd9d66431ef0.png)
![](https://img.xkw.com/dksih/QBM/2018/12/4/2089399790116864/2089664927072256/STEM/e1a3123384ad43238aa6dcaa9d5260ba.png?resizew=226)
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9 . 给定数列
.证明:存在唯一分解
,其中,数列
非负,
单调不减,且
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac78986b70e038c35754aafa583ccba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1165edc23b5782b5942ef7e79130bb94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078c417ea54a5065c1f72941b9e4b0be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b45a24a414adba5c86957f3d4f43d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad27fa47d5eea8561dfdfb804cd291f1.png)
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10 . 已知椭圆
,经过点
,离心率为
.过椭圆
的右焦点作斜率为
的直线
,与椭圆
交于
、
两点,记
、
的斜率分别为
、
.
(1)求椭圆的标准方程;
(2)若
,求实数
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3aa4dd68b3e8291beb8ea8b69edc81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求椭圆的标准方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d200a411fbc2f50ad72f1fd729a7d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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