填空题-单空题 适中0.64 引用1 组卷559
对于函数
,有以下说法:
①
是
的极值点.
②当
时,
在
上是减函数.
③
的图像与
处的切线必相交于另一点.
④若
且
则
有最小值是
.
其中说法正确的序号是___________ .
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/33ab23d219d64985b3f090fbf9797e6b.png?resizew=119)
①
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/c9281957ea904b929eb91374f4ca1f08.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/969ab8d305cb4c949e48cc879a168f91.png?resizew=36)
②当
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/fdbfe123468c46bf86a7e77c65d6c031.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/969ab8d305cb4c949e48cc879a168f91.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/7f01a2627465485a9ce80a309b40cc25.png?resizew=72)
③
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/969ab8d305cb4c949e48cc879a168f91.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/44b52e3ec1a94026b516d65b6c61b48a.png?resizew=60)
④若
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/277c90876f6145778e6cd80894d4641e.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/39bd0aaa91204a979dab842d83cc9bac.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/2a606d1342454855ae47c22f0ade4a7b.png?resizew=83)
![](https://img.xkw.com/dksih/QBM/2016/6/21/1572762882621440/1572762888486912/STEM/da8a43d029b743e3b0f724720788dce3.png?resizew=21)
其中说法正确的序号是
15-16高二下·贵州遵义·期中
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