已知函数
,若方程
有四个不同的解
且
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea87044704c170b01362b29b1d089d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ccd22fd0ca1a8e1468329284f91b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94121a5679d5c050f166ff72cd0837e6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-07-23 12:35:35
|
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【推荐1】对于函数
,若存在区间
,使得
,则称函数
为“可等域函数”,区间
为函数
的一个“可等域区间”.给出下列4个函数:
①
;②
; ③
; ④
.
其中存在唯一“可等域区间”的“可等域函数”为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4728362b29de88a7a9b5b5d3bf6d894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd1ca0cf68bef34f39b9701f0b56205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94a72c1a0c2801efe9f3bb1a412c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1439c562a1331c7245f7ad4c70e0b6b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de73a16db57317970e8da776b78af9ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda824b37b5420579555fdacece101ec.png)
其中存在唯一“可等域区间”的“可等域函数”为( )
A.①②③ | B.②③ | C.①③ | D.②③④ |
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【推荐2】若定义在
上的函数
满足:对于任意
,有
,且
时,有
,设
在
上的最大值,最小值分别为
,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7a722265c9b1d239414f5829039f78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f316df2019769f5a2b10b68446015c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7fde71807463dbdfd8fce1655a5a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf6d0e286ca11174b9678e3a18b357b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926206e138af4c23b29680d02c293092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae0f8520349250a31be6d58542ef2d9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】已知函数
,若函数
有且只有两个零点,则
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84828e7199cf9d557eecd29f317924ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fa83beb691e720850f125a316bbd9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知函数
有两个不同的零点
,符号
表示不超过
的最大整数,如
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbeeb712247ed1c0596d2908c6046bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f161c2a3717f1b6c62d0d7dae0b606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e43042dc14dfc22d2f7a9de0f1d0531.png)
A.![]() ![]() |
B.![]() |
C.![]() |
D.若![]() ![]() ![]() |
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