Question

sendo log de 2 na base A igual 20 e log de 5 na base A igual 30 calcule o valor de log de 100 na base A????

Answer 1

100 = 2*2*5*5 
log(a) 100 = log(a) 2 + log(a) 5 + log(a) 2 + log(a) 5 
log(a) 100 = 20 + 30 + 20 + 30 
log(a) 100 = 100