Question

log 2= 0,30, log 3=0,48 log 5=0,70
calcule
a)log 15

b)log 30

c)log 18

Answer 1

a) log15 = log3.5 = log3 + log5 = 0,48 + 0,70 = 1,18

b) log30 = log3.5.2 = log3 + log5 + log2 = 0,48 + 0,70 + 0,30 = 1,48

c) log18 = log3.3.2 = log3 + log3 + log2 = 0,48 + 0,48 + 0,30 = 1,26