关于函数
有如下四个结论:
①
,
为奇函数;
②曲线
的切线斜率不可能小于
;
③对任意
,曲线
都有两条切线与直线
平行;
④存在
,使得曲线
只有一条切线与直线
平行.
其中所有正确结论的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25cdb9c41a4aa4a0152beda25a762ba8.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4eee6c68e48303626cac0982a31615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997c217ce7e9b8fa59d17bad1d573877.png)
③对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
④存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6e15daf7b14dbff32c390f4984dcfb.png)
其中所有正确结论的序号是
更新时间:2022-03-20 10:26:00
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解题方法
【推荐1】已知函数
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【推荐2】狄利克雷函数
定义为:当自变量取有理数时,函数值为1当自变量取无理数时,函数值为0.以下关于狄利克雷函数
的性质:
①
的值域为
;
②若
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成立;
③函数
的图象关于
轴对称;
④不存在
,使得
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其中表述正确的是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238fba9b391d01ceb071e78ee221035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238fba9b391d01ceb071e78ee221035.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238fba9b391d01ceb071e78ee221035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b2be1b0b6bea70d4e64894f1009359.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3c7d9a147725bd2ee363e3364b97b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d840930449728dbd1518c8496141b50a.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8238fba9b391d01ceb071e78ee221035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
④不存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7fade173f70c058531c600cfd650d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】已知点
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【推荐1】已知函数
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【推荐2】已知抛物线
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的右焦点为
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