65
punti
Livello 1
111
Supponendo x > 1
log_2 (x + 1) + log_2 (x - 1)^5 - log_2 (x - 1)^4 - log_2 (x + 1)^4 =
= log_2 [(x + 1)(x - 1)^5/((x - 1)^4 * (x + 1)^4 ) ] =
= log_2 (x - 1)/(x + 1)^3
112
log_7 a - log_7 b^2 + log_7 c^(1/2) - 3 log_7 a + 3/2 log_7 c =
= - 2 log_7 a - log_7 b^2 + log_7 c^(1/2)*c^(3/2) =
= log_7 c^2 - log_7 a^2 - log_7 b^2 =
= log_7 c^2/(a^2 b^2)
Nota Deve essere a > 0, b > 0, c > 0
58347
punti
Livello 7