名校
1 . 已知函数
.
(1)讨论
的单调性;
(2)设
分别是
的极小值点和极大值点,记
.
(i)证明:直线
与曲线
交于除
外另一点
;
(ii)在(i)结论下,判断是否存在定值
且
,使
,若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adeb6caf7f8a5e4b99f36deaf59d54ea.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc31583f3fb7c2483a332278daa27a74.png)
(i)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(ii)在(i)结论下,判断是否存在定值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bef924a389afe4b07869271f428dc13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd10968900343aaaa158451018166fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8139e39417cd5722a0f6581236ea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2024-04-13更新
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432次组卷
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2卷引用:吉林省吉林地区普通高中2024届高三第三次模拟考试数学试题