1 . 已知函数
,
.
(1)求证:对
,函数
与
存在相同的增区间;
(2)若对任意的
,
,都有
成立,求正整数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1c5a6e27236387623481b1250326ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4475d7483818e64accb33e96ff90c83.png)
(1)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6e67c85971a3fbef7a0b0a59b92dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fce924911d5ed93147dfce9e41c2b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2 . 设
.
(1)若直线
与和
和
图象均相切,求直线
的方程;
(2)是否存在
使得
按某种顺序组成等差数列?若存在,这样的
有几个?若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550e9fd0afb51923f72b65ce72bbe419.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbb0751d3fe0d2a6cc024a62e9f7825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d34ea801c04c749794ee2e15c3110c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
您最近一年使用:0次