1 . 已知函数
,对于
上的任意
有如下条件:①
;②
;③
.其中能使
恒成立的条件是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eef9512368e6be8822af1301cf6d4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1a4c0fa37bd416ffa5cbfb9c35b258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41ffabc3a9450236caadf26ffaa0b2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6cf5bb0e86642ec118322b6edc081b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8191bd327094bfbcdeba81fe6b945dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4075d4b42a2597bfce06ba34d5f948f.png)
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12-13高一上·四川巴中·期末
2 . 已知函数![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/7b4458986dc24c878b1bc6e464d0a8bd.png)
(Ⅰ)①判断函数的奇偶性,并加以证明;
②若
(-1,1),计算
;
(Ⅱ)若函数
在
上恒有零点,求实数m的取值范围;
(Ⅲ)若n为正整数,求证:
.
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/7b4458986dc24c878b1bc6e464d0a8bd.png)
(Ⅰ)①判断函数的奇偶性,并加以证明;
②若
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/689dd62d1194434b861d6519db247dad.png)
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/e014711e270c4c63bf082ebe16432dcf.png)
(Ⅱ)若函数
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/67ec7745a25e4fa0bdd28a138348d1bc.png)
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/b0b7086aa0ae4cf9a3855b2528f56bad.png)
(Ⅲ)若n为正整数,求证:
![](https://img.xkw.com/dksih/QBM/2012/2/2/1570710307332096/1570710312828928/STEM/d00c7b3cc477474ab2a54448b3fbb95c.png)
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