N
newnew44
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
![](https://blog.hocmai.vn/wp-content/uploads/2017/07/hot.gif)
Rút gọn :
\[\sqrt {1 + \frac{1}{{{a^2}}} + \frac{1}{{{{(a + 1)}^2}}}} \]
với a>0
\[\sqrt {1 + \frac{1}{{{a^2}}} + \frac{1}{{{{(a + 1)}^2}}}} \]
với a>0
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