Réponse :
Explications étape par étape
Bonjour,
[tex]log(0.2) = log(2*0.1) = log(2*10^{-1}) = log(2) + log(10^{-1}) = -1 + log(2) = -1 + 0.3 = -0.7[/tex]
[tex]log(200) = log(2*100) = log(2*10^2) = log(2) + log(10^2) = log(2) + 2 = 0.3 + 2 = 2.3[/tex]
[tex]log(2^5) = 5*log(2) = 5*0.3 = 1.5[/tex]
[tex]log(0.4) = log(4*0.1) = log(4*10^{-1}) = log(2^2) + log(10^{-1}) = -1 + 2* log(2) = -1 + 2*0.3 = -0.4[/tex]
