有下列命题:
①若函数
,则函数
的最小值为-2.
②三次函数
有极值点的充要条件是
;
③若
是定义在
上的奇函数,且
也为奇函数,则
是以4为周期的周期函数.
④若函数
在
上单调递减,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d33520eaad6e2bf39b12dc32e2bd46.png)
;其中真命题的序号是________ .
①若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b117d53385bdfa436b00cce723342492.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②三次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbde9043dfe0a11dd9094fdad31d93f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ff0c8431974cdfd6469c3878202f2b.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7661d3fc28f785b438ad8c8f9d240a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93fa19b57042eb2b9b38ef37d475b0ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d33520eaad6e2bf39b12dc32e2bd46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6446d825f2b121345ea7fff222665d.png)
更新时间:2018-10-17 18:25:50
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名校
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
满足
,函数
,若函数
与
的图象共有12个交点,记作
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3210274e57cc0487a58b99ea274b8aa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9409b8aa25c2b8d02bb17f2a8555723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b068d88b2d444700bffa4728912c076d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cfa2fd0a0c0f69b3bf285048c34cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45c81451da24b56e9fe5e117e13f973.png)
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解题方法
【推荐2】已知函数
给出下列五个结论:
①
存在无数个零点;
②不等式
的解集为
(
);
③
在区间
上单调递减;
④函数
的图象关于直线
对称;
⑤对
(
),都有
.
其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c389aba166217181bb9654231040dd3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
②不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfdecc7f8089cb23c20d0a93ee1b601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f261aecd4a435877e4cf85110fcc422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c5ad1eae92972907b41b66bc6c4a93.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a49a26cf164e6f90fbd6fadd34bb82fc.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
⑤对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d1f29f7e939d7c79648e5f4f35ae909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b0d89736a10c53998013df4a354396.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad41c9c9b029ecf2d050cbafd161d0cd.png)
其中所有正确结论的序号是
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【推荐1】函数
满足
且
,则称函数
为M函数.当
时,
,
,且
,
均为M函数,则方程
在区间
上所有根的和为______ .(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d61f63c51f3b3ec2ee91f24ffcac6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd51b3cbd5dc46c1788178fd89dfb9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d30b193d1befc87b1a2a400e39b9b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1da9aa9c7764d416d2b01f78d3e13ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d61cd826015d9bcee4ef27405aafa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc6ec0c3b57cf29ecf13ab8f1b0238df.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35b7cfcc147916ae7eeb5d557fea945e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25522700e456c259978a6d762e818572.png)
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【推荐2】已知定义在
上的函数
满足
,且
为偶函数,当
时,
,若关于
的方程
有4个不同实根,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34e9794d31b207750914222a39d9036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d7661d3fc28f785b438ad8c8f9d240a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966d9dd819cba29980da3700422c2497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec84404bbf6cf4a9d992e1760dcfdd4.png)
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【推荐3】定义域为
的函数
的图象关于直线
对称,当
时,
,且对任意
,有
,
,则方程
实数根的个数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ab2c3eeb8955e66634d9893b8d63a1.png)
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