2024高三·全国·专题练习
名校
解题方法
1 . 已知定义在
上函数
同时满足如下三个条件:
①对任意
都有
;
②当
时,
;
③
.
(1)计算
的值;
(2)证明
在
上为减函数;
(3)有集合
,
问:是否存在点
使
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74ba4c1c25324a8875b09d0c855a82ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f49f899086e636caaed2075a2c7b924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25bea6d14c16f7c06e4e028f36131360.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71baf6217604517fd98fa97d0f55b43.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ed85d47b4f488a9b5e211938cc5424.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f82d7c68f10d3b6f065304ec67f160.png)
(2)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(3)有集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f334bd3fdd58a808bba8cacf336c63cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c4bac36d0869c1353b7d97f4f7d022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116b713cd1ae96520d05c54882463f94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90526e1357becfdcd1b87caeff7ee032.png)
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