Respostas

2014-02-13T08:19:26-02:00
 \sqrt[x]{625}  =5

625 = 5^4

 \sqrt[x]{5^4} =5          5 = 5^1

5^ \frac{4}{x} = 5^1      ( simplifica o 5)

 \frac{4}{x}  = 1

x = 4  índice !!!!


 \left[\begin{array}{ccc}   \sqrt[4]{625 } =5        \end{array}\right]