解题方法
1 . 已知
为实数,对于实数
和
,定义运算“
”:
,
设
.
(Ⅰ)若
在
上为增函数,求实数
的取值范围;
(Ⅱ)若方程
有三个不同的解,记此三个解的积为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0a7d57d7ecb1662c3cb0c5cef85f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79d366cf95dd795bb599a3f16608c113.png)
设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c3584ec8b0300ca1ae7002f8ac82c5.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6112b8764f2f4341309ab20419efd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(Ⅱ)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/502c4ff1cd420b9da4de849e63c307e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ec17e3deee2eb0642298e7422998f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ec17e3deee2eb0642298e7422998f7.png)
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11-12高一上·黑龙江牡丹江·期中
2 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3f6b391ea61123ad971c054b145513.png)
(1)若函数
为奇函数,求a的值.
(2)若
,有唯一实数解,求a的取值范围.
(3)若
,则是否存在实数
(
),使得函数
的定义域和值域都为
.若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d28fd96a55f935ee1528bb1047f6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3f6b391ea61123ad971c054b145513.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ccc17226e09066a73258811c81e67a0.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b108daeed07cc138b15d220f397eacd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db527571cfd256c515424c6f9d114284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
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