函数
的单调递增区间为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b106f9cdd01c7355fee798ddd5140d8b.png)
更新时间:2021-11-27 22:38:16
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【推荐2】若函数
存在零点,且与函数
的零点完全相同,则实数
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38b57c981aff3d5b47ec05818bae3847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e56e3224d58e0cfd256493f3fc63df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
填空题-单空题
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较易
(0.85)
【推荐2】有下列命题:
①函数
与
的图象关于
轴对称;
②若函数
,则函数
的最小值为-2;
③若函数
在
上单调递增,则
;
④若
是
上的减函数,则
的取值范围是
.
其中正确命题的序号是__________ .
①函数
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/812a5d9d1f0f4b94b5dacf4ab27cbaba.png?resizew=95)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/f716a8eb05504138b60df4cb22a5772b.png?resizew=85)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/6acb4df893af4189a4c6519bb23bb63d.png?resizew=15)
②若函数
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/59e35be64ca74408aaa793530365ce43.png?resizew=215)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/2687379b8f4b4b8bbb21ec0ca94ad3c7.png?resizew=36)
③若函数
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/891e9ead6c114f4aa68fa6d7bf5ed176.png?resizew=176)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/52cedf0bdb9f4ab79ba0751b3284a7ad.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/95bc5254ad7c44639288710fabe2a4c7.png?resizew=112)
④若
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/5a8c03ebb8f548c3a0970a1c85a628cc.png?resizew=194)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/690ae851f6c74d3d82d54012b78fd0f4.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/342a39d6203d4b2fb86976173b3e4987.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/9/5/1571850337034240/1571850342809600/STEM/913faca6ed9c485c80679daf174c980a.png?resizew=38)
其中正确命题的序号是
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