2013·江西南昌·二模
1 . 设
若不等式
≥
对任意实数![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/01801450acac4cbb9ac1b726f37abc02.png?resizew=13)
恒成立,则
的取值集合是________________ .
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/2ef68283cd8348d7884110265a33bd89.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/bfe2b7b081914090b896bf7e6167c3b3.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/f9a197b945494d76931ed40b2bf9e2f2.png?resizew=108)
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/01801450acac4cbb9ac1b726f37abc02.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/cffc3770ead1472c8a52748c977a2021.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2013/9/6/1571345106460672/1571345233428480/STEM/cb7184e581cd45debd4f55f5171237f8.png?resizew=13)
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10-11高三·江西·阶段练习
2 . 不等式
,对
恒成立的实数
的取值范围__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306bd1eb6899399ed6008fbaf4db814e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ee50455bac107c05ed8e1918221e1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2011·江西抚州·一模
3 . 不等式
的解集是________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14f3c390f4d1d345237b01d00c770455.png)
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11-12高二上·湖北黄石·期末
4 . 若规定
,则不等式
的解集为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf4e9bfc450e34b679085c8ce3241aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7044299dd9e4ab4aed9e1c65725fc7.png)
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