填空题-单空题 适中0.65 引用2 组卷691
(1)
≥2成立当且仅当a,b均为正数.(2)
的最小值是
(3)
的最大值是
(4)|a+
|≥2成立当且仅当a≠0.以上命题是真命题的是 ___________
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/6822f1ccad4640989d857d916050ce66.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/398bbc6f0f1a4b0597ee4f0b8d64d8fd.png?resizew=131)
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/54e38ed1300a44e89838709b1b126e7c.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/07edf96f213445db895101889ca6defd.png?resizew=177)
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/b40c8caf65304c0f9372de0d611a6061.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2012/8/8/1570956899680256/1570956904742912/STEM/14848742ebb2491296581524a4ce246a.png?resizew=15)
10-11高二·浙江杭州·期中
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