解题方法
1 . 试判断函数
在[
,+∞)上的单调性,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b9b1d29604d6123345f0950d88fa58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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10-11高一上·江西新余·阶段练习
2 . 若函数
同时满足:①对于定义域上的任意
,恒有
②对于定义域上的任意
,当
时,恒有
,则称函数
为“理想函数”.给出下列四个函数中:⑴
⑵ ![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/c143d250c56543179ad3a6d9f2447286.png?resizew=65)
⑶
, ⑷
,能被称为“理想函数”的有____________ (填相应的序号) .
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/40962e89de904f59a3eb6ae82f5c2dfd.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/ed8f3c9fbf6e43b8896cbd80f7bd5f6e.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/ee54adcf45d8484c9372763679bb1a5c.png?resizew=115)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/14d04e7f69dc47ee94fa8ab5c9ac8202.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/7d2d1c7aa55f49f187e044158629bbfa.png?resizew=49)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/a7cc2a25ee8048b7835a20f7f898981f.png?resizew=117)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/40962e89de904f59a3eb6ae82f5c2dfd.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/e16110ad54bb413ab43aa7a662fc75f5.png?resizew=63)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/c143d250c56543179ad3a6d9f2447286.png?resizew=65)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/ea9feb1b9f644d44bee71d96ae541d18.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/64f77c5259394807bc0c62f8d91deb98.png?resizew=91)
![](https://img.xkw.com/dksih/QBM/2015/1/19/1571967753633792/1571967759482880/STEM/15a6d5242dc64538b0e9c215ab84b4e4.png?resizew=135)
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3 . 设集合
点
在映射
的作用下对应的数是
,则对B中的数
,与之对应的A中的元素可能为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341a8875d4e49d2d0ba6319f5883609c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c18c5a035fd258bb6e372ae16496850.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e90af903bd1065db70c95bc4b7d5605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
A.(1,1) | B.(2,1) | C.(-2,-3) | D.(-3,-2) |
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4 . 已知奇函数
当
时,
,则当
时,
的表达式是.
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571965326745600/1571965332275200/STEM/e086e804f2e04509b3105303c8a505a9.png)
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571965326745600/1571965332275200/STEM/cf8812e3c6dd436082e4924ecb955598.png)
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571965326745600/1571965332275200/STEM/baae938e96124594b43cb1489f075a70.png)
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571965326745600/1571965332275200/STEM/befc5166b2ec441ebfbb4ca40c4164ff.png)
![](https://img.xkw.com/dksih/QBM/2015/1/15/1571965326745600/1571965332275200/STEM/e086e804f2e04509b3105303c8a505a9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 已知函数
满足:任意给定
,都有
,且任意
,
,
,则下列结论正确的题号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9a7e92b379b93bca9b4f7b032fb61a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e70db4fa015a8b4fb6da18c6959ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae5ef85731cd913804b8ea86de3df23.png)
A.![]() | B.任意给定![]() ![]() |
C.![]() | D.若![]() ![]() |
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名校
6 . 已知函数
的最小值为
,其图象与y轴的交点为
.
(1)求
的解析式;
(2)求
在
上的单调递增区间;
(3)对于任意的
,
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c22a9b344e24d5f48ef8de38c0a2bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ed3345d00bfcbabb50d64c457a3b58.png)
(3)对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7fa15ce20b7a075742dceb172153f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e39b4cc00edd5e6442eea18b6c16e5d.png)
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7 . 对于函数f(x)=x|x|+px+q,现给出四个结论:
①q=0时,f(x)为奇函数;
②y=f(x)的图象关于(0,q)对称;
③p=0,q>0时,方程f(x)=0有且只有一个实数根;
④方程f(x)=0至多有两个实数根.
其中正确的结论的序号为________ .
①q=0时,f(x)为奇函数;
②y=f(x)的图象关于(0,q)对称;
③p=0,q>0时,方程f(x)=0有且只有一个实数根;
④方程f(x)=0至多有两个实数根.
其中正确的结论的序号为
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11-12高三上·湖北黄冈·阶段练习
8 . 设
是周期为2的奇函数,当
时,
,
则
=
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570637123715072/1570637128818688/STEM/ddd52708d671456a8fb2389a359a6a14.png)
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570637123715072/1570637128818688/STEM/f0dd7ab80c3a4e36b83c86eebeda5c92.png)
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570637123715072/1570637128818688/STEM/becb8e9e44bd44f59b09ee6410819ddf.png)
则
![](https://img.xkw.com/dksih/QBM/2011/12/28/1570637123715072/1570637128818688/STEM/586cbbd79b7943038129de6ca1a0920e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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13-14高三上·山东日照·阶段练习
名校
9 . 若存在负实数使得方程
成立,则实数
的取值范围是
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571394188181504/1571394193833984/STEM/6624a95b3a7a43edb4b3780d6b015bee.png)
![](https://img.xkw.com/dksih/QBM/2013/11/26/1571394188181504/1571394193833984/STEM/a249c3e96d3549cab0c96e37a94af62a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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11-12高三上·江西·阶段练习
解题方法
10 . 已知函数
,则不等式
的解集是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d498b2ebc4cce67a8b0d5f457144a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429da70f8efbfb2d445918e9c182434f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次