Respostas

2014-02-16T21:18:20-03:00
X1 = 10n -3
x2 = 10n
a = x2 / x1
a= 10n / (10n - 3)
x4 = x1. a³
x4 = (10n - 3 ) . (10n / 10n - 3)³
x4 = (10n - 3 ) . 10³n³ / (10n - 3)³
x4 = 10³n³ / (10n - 3)²
x4 = 1000n³ / (10n - )²
2 5 2