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解题方法
1 . 已知
是定义在R上的奇函数,其中
,且
.
(1)求a,b的值;
(2)判断
在
上的单调性(判断即可,不必证明);
(3)设
,若对任意的
,总存在
,使得
成立,求非负实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b06295745406e6bf8f5af9a74fbf2807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360ff131c51a4ef6745538c18cec92c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9da4fdfdddc259dcef9fdd4b826b64.png)
(1)求a,b的值;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda591d3909af06eabf6b37c65bfe571.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb8b52b9f71d8cc6e86c7d9a8a47a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f985718530cae9003dd401c044ef3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a49684ba67f71171321586f1a77ad4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
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