解题方法
1 . 设函数
满足条件
,
,
,且在区间
上,
其中集中
.给出下列四个结论:
①
;
②函数
的值域为
;
③函数
在
上单调递增;
④函数
在
上单调递减.
其中所有正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47144278d622b666fcff69aee5abc5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c25fb0c3e1b6ef211233170b9aa9001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca07d3a7922058d6873f8c278f9517b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0ab8d3b4f144b1436a8c3cf2ac8dc5.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01251d44e688d6f61d3542ed374f3298.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a630b0c9e1bf2ca2969098af972f5e8.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c343089f513fa02fb97e8479f0ccc72c.png)
其中所有正确结论的序号是
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解题方法
2 . 已知函数
,若关于
的方程
有两个不同的实根,则实数k的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f3c4a37f312e73d15a59c8e2ebb82f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce90064385c4633056784c1ae375a2d5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次