已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9beaab1c201691a61537bf2090ebbf.png)
(1)求不等式
的解集;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9beaab1c201691a61537bf2090ebbf.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af17da44f31ca7c23820d925db0fda2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a6d1a7ef54d4a35c5cf5467eaa4b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2018-12-07 17:22:08
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解答题-问答题
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较易
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解题方法
【推荐2】已知函数
.
(1)当
时,求不等式
的解集;
(2)若存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/042153deeecc7c6a153aa06497aea236.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990d3feee85e869ea9ab561ff63d46a2.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799b324b514d6044672c133d8fef2dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e868ffc346a47690e200cda6e5e160d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
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较易
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解题方法
【推荐3】设函数
.
(1)若
,求
的取值范围;
(2)若
,在(1)的条件下,记
的最小正整数为
,且正实数
,
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2dc1ccc320976a4ae5b0425fe6b8a9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c0993500d9c4784c57845d57647d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779aafbe0e6b299ccd5af3e4de5a2732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a303bf7a5a44f602738510defca840c0.png)
您最近一年使用:0次
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【推荐2】若关于
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(1)求集合
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(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3c35d62d6741c1a2a69e3762d44641.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2b85186925658e66d8541a5645269e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667b9d8266b8070f1c3ced34edb68e38.png)
您最近一年使用:0次