Question

P14 - Usando Log2 = 0,3, Log3 = 0,47 e Log5 = 0,69, Calcule:

A) Log3 5
B) Log5 2
C)Log9 45

Answer 1

Boa noite

log(2) = 0.3
log(3) = 0.47
log(5) = 0.69

a) log3(5) = log(5)/log(3) = 0.69/0.47 = 1.47 

b) log5(2) = log(2)/log(5) = 0.69/0.3 = 2.3 

c) log9(45) = log9(9*5) = log9(9) + log(5)/log(9) 
log9(9) + log(5)/log(9) = 1 + 0.69/'0.6 = 2.15