解题方法
1 . 已知
是奇函数,且在
内是减函数,又
,则
的解集是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/196be101149acfb6a6c4ceca7fc96828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86213096e8b50debedaa87181d7085cc.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2 . 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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3 . 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)
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4 . 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 |
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解题方法
5 . 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 |
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解题方法
6 . 已知函数
满足下列条件:
(1)当
时,
,且
;
(2)当
时,
;
(3)在
上的最小值为0.
求最大的
,使得存在
,只要
,就有
成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7620b8fd2fe76cdcfceee953e1492e90.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd089822beae382e173954e7b2f5b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f028e597d34316db2c4c993fc72ff32d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff133c17652425c22f0b367e002797df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda178cf86d2baff95be7e655f020fc3.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
求最大的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884ce1e9436d39f34f6d3116cb2a140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf039c46a25e331446c6ee1e9af3c82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08696f29924fad88f81c45c11149917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa5db87f46602bdba3df300ffe16b0a.png)
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7 . 整数m,n满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705d0cd198f423d1a7d6b9a7999c18ee.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a24aa90aa2d2ad600a5fce8ea1a88dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/705d0cd198f423d1a7d6b9a7999c18ee.png)
您最近一年使用:0次
解题方法
8 . 定义在整数集上的函数
满足:
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4138e3a956d50c217cdd4799ff1edd.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11aa7165f452c8e8a84dbcc183b65f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4138e3a956d50c217cdd4799ff1edd.png)
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9 . 记不超过x的最大整数为
,若集合
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72ef9665654c618812d35f99535549d.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe65fd88f6f84c855b9f564d50eebc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72ef9665654c618812d35f99535549d.png)
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10 . 若关于x的方程
恰有一根在
上,则m的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0d81a23ca4754f23dcf0d4dc8a7f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
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