Réponses

2014-03-02T20:19:54+01:00

1) (-7/10) ^1 = -7/10

2) (-2/5)^3 = -2/5 * -2/5 * -2/5 = (-2)^3 / (^5)^3 = -8/125

3) (-2/3)^4 = -2/3 * -2/3 * -2/3 * -2/3 = (-2)^4 /(3)^4 = 16/81