若直线
为函数
图象的一条切线,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9cc215a10aaeb7d12c5c971725b21bb.png)
更新时间:2017-12-07 13:57:29
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【推荐2】若曲线
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