Respostas

2014-05-21T20:33:20-03:00
Expoente -2, pq inverte a potencia.
2014-05-21T20:35:43-03:00
 \frac{6}{5} ^x =  \frac{25}{36}  \\  \\  \frac{6}{5} ^{-2} =  \frac{5}{6} ^2=  \frac{25}{36}

sendo assim , o expoente x equivale a -2
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