1 . 已知集合
,且
,给出下列命题:
①满足
的集合
的个数为
;
②满足
⫋
的集合
的个数为
;
③满足
⫋
的集合
的个数为
;
④满足
⫋
⫋
的集合
的个数为
.
其中正确的是______ .(填上你认为正确的所有命题序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab20b8212340e97321f421a74de3af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eae51f0310b87cde2e206643e9d25a5.png)
①满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24b70c88f46920bc6c3b0ed8d900f90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa3ccc967a75d0739e71f8df80b5b76.png)
②满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366749e18358402f70feb02785251caf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c89ae078ee147741e42b344b3d20776b.png)
③满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22882310035db6d3d953e060b0c91733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3e84efcba619b04bc1a89e68f1c507.png)
④满足
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67e9f11658eb229c3f75eb3ff71ac23.png)
其中正确的是
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2 . 设
,若存在常数
使得对于任意的
,都有
满足
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eac4d6bf066089b2243947dbdb18cf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff83cf36f43fdae2ae584bd5060a66bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648056709a55446f597e5849d7fc41fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知函数
,
(
),若对任意的
,总存在
,使得
,则实数
的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be315e528951120e7d551f654d2a1f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87f410890a33f9fa57a90abb2cd2eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3a5b4f2b7279a7aa94f8ec12b3f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0cdf79ec49d52434473ee082eefc86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-14更新
|
109次组卷
|
2卷引用:第十三届高一试题(A卷)-“枫叶新希望杯”全国数学大赛真题解析(高中版)
解题方法
4 . 已知
是定义在
上的偶函数,对任意的
,且
,都有
,则( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e32125207addc3fdb92ceb0ec80ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f09c0670e752aa71b00f219f374b8c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 已知函数
,如果关于
的方程
恰有6个不同的实数根,则下列说法一定正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d5529c4cd422853d5f7244414c7d8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a877ab9d6a59eca86bf22e811553928c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 某市A、B两地之间相距60千米,如图所示,有一条直线铁路经过
地,测量得
地距离铁路48千米.现要在A、B两地之间运送货物,计划从铁路沿线上的
处修筑一条直线公路通往
地,已知公路的运费是铁路运费的2倍,铁路运费为每千米100元,问
点选在何处时可使总运费最少,最少是多少元?
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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7 . 给定集合
,若集合
,且对集合
中任意两个元素
、
,不妨设
,都有
或
,则称集合
具有性质
.假定集合
满足形式
,则具有性质
的集合
中的最小元素![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbb27a21cea9706f1d7688dc8c9f352.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9533c90de1b697cc9e78adaf134fb972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d0d79fd0efdb59c9ca65bfae4a0861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f68a3f6fa83a180dd6cc40e227df87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c9158f76cef11b05915874095d22c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acde89240882f0af5169847117b9df77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbb27a21cea9706f1d7688dc8c9f352.png)
您最近一年使用:0次
8 . 我们称数集
为数域
,当且仅当数集
中的任意两个元素经过加法、减法、乘法、除法(除数不为0)四则运算后,其运算结果仍在数集
中,则下列数集能称作数域的是( ).
![](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/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
A.自然数集 | B.整数集 | C.有理数集 | D.无理数集 |
您最近一年使用:0次
解题方法
9 . 已知函数
的定义域为
,对任意的
,都有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274c8d81c4c746222a2b904812872bf0.png)
成立,则函数
的奇偶性是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd423a80d5b6fea8753fa1813cfbcc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274c8d81c4c746222a2b904812872bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a03c24a03a215d5df388b1e27e396f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
A.既奇又偶 | B.非奇非偶 | C.奇非偶 | D.偶非奇 |
您最近一年使用:0次
10 . 2013年11月第十八届三中全会于北京召开,会上指出我国社会保障事业全面推进,已基本建成覆盖城乡的社会保障体系.2012年末,全国参加城镇职工基本养老保险人数30426.8万人,比1989年末增加24716.5万人.假定城镇职工基本养老保险人数的年增长率保持不变,再经过5年(不考虑其他因素),该人数最接近( )亿人.(注:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fa97d6a7640a85255ad45a695efe4c.png)
A.3.5 | B.4.5 | C.5 | D.6 |
您最近一年使用:0次