已知函数
其中
.那么
的零点是_____ ;若
的值域是
,则c的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8014da8354866e5879ff2e8d91a190fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c4830692e13c0efc57cfa7e4a0281c.png)
2012·北京西城·一模 查看更多[2]
更新时间:2016-12-01 18:29:40
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【推荐2】已知
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【推荐1】设函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6406bb799b47c01ee3dd14c0fb3f05be.png)
①若
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②若
有最小值,则实数
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6406bb799b47c01ee3dd14c0fb3f05be.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
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②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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