2012高三上·上海·学业考试
名校
1 . 已知函数
,其中
.
(1)当
时,设
,
,求
的解析式及定义域;
(2)当
,
时,求
的最小值;
(3)设
,当
时,
对任意
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68663c9cdbdb9585a5aba78e86199361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e14206c7d228a7c2259a7b27da8813.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4287e3fbd7910c03606ab99d69ecc669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/763430588d2176dcf51cffa8940109b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1510dd289cf6a899f2d817ca5b6782e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514b4a1384404b2b846db12d7d1e8008.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4287e3fbd7910c03606ab99d69ecc669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0d7fbcc396c7b646c31f60e32d9e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ed481b54b7b8c776bedb8b76346590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b1499e806c0cac5417dc62702c7df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e207cf62e3a7e282eac4c4a3455bbf9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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3卷引用:2012届上海市十三校高三上学期第一次联考试题文科数学
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