已知函数
:① 函数
的单调递减区间为
;② 若函数
有且只有一个零点,则
;③ 若
,则
,使得函数
恰有2个零点
,
,
恰有一个零点
,且
,
.其中,所有正确结论的序号是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c832be7e1a665c3c3f41f85ba8c0aec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6ffa6fe2387ee19234c2ad0fcb92ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3c2be7482719651bcf491949681e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2015d9a88fb4d8f0520790693abc9649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965108c7d8b422b6cb31623c9d35f2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a755f62a652cd6ecdaac67f64ad4a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d7eeb37cdcbf570e932e0614603238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa3a50b913a556376d974e6f6244e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/337668ae4fe1ac6e862907c78ab10bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a399a276e30510e557b42ee5db5510b2.png)
更新时间:2020-07-23 22:29:14
|
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填空题-单空题
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适中
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名校
【推荐1】函数
的单调递减区间为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbc647d93c98626d89ca231678463a3.png)
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解题方法
【推荐2】设
是定义在
上的偶函数,且对于
恒有
,已知当
时,
则
(1)
的周期是2;
(2)
在
上递减,在
上递增;
(3)
的最大值是2,最小值是1;
(4)当
时,
,其中正确的命题的序号是____________________ .
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/a0294e4ba03e44319fc41793b50b67c9.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/835ff0eb34774cffa7119e93ef40900f.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/041321ecbfec400896dbdc86f8a4cf91.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/a23211ef255e4d9cae498971a3f55b6b.png?resizew=120)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/40759bc57ace4cf38289f3617191902c.png?resizew=53)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/8665071b7d30413190be859551da800f.png?resizew=75)
(1)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/a0294e4ba03e44319fc41793b50b67c9.png?resizew=35)
(2)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/a0294e4ba03e44319fc41793b50b67c9.png?resizew=35)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.png)
(3)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/a0294e4ba03e44319fc41793b50b67c9.png?resizew=35)
(4)当
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/7289e7ad32ba4510adf9d48909bb8e83.png?resizew=57)
![](https://img.xkw.com/dksih/QBM/2015/7/6/1572166314434560/1572166320332800/STEM/0de004e0697544b8bbc68ea4e646e341.png?resizew=76)
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__________ .
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