名校
1 . 已知函数
的图象过点
.
(Ⅰ)求实数
的值;
(Ⅱ)若不等式
恒成立,求实数
的取值范围;
(Ⅲ)若函数
,
,是否存在实数
使得
的最小值为
,若存在请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1192eea3535791021236b4551af70d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707c84c0972db1acbc5ba3dfa4548411.png)
(Ⅰ)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(Ⅱ)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279b4bf8b44f757c02d025bf6e4ba9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(Ⅲ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab73b8eb6384ed769c84f2d1f6695869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9120f05db9ab79f7569db1e16ca19d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2018-12-12更新
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3卷引用:内蒙古锡林浩特市第六中学2019-2020学年高一上学期期中数学试题