Réponse :Bonjour,
Exercice 3 :
8.571 * 10^3
4.56 * 10^2
3.1 * 10 ^ -2
1.25*10^-2
Exercice 4:
5^-2 = 1/5^2 = 1/25 car a^(-b) = 1 / a^b
10^-4 = 0.0001
(-2) ^-3 = 1/ (-2)^3 = 1/ -8 = -1/8
