Question

Sabendo que log5=0,69 e log3=0,47 . calcule Log 18

Answer 1

log5=0,69
log3=0,47

log18=?

18=2.3.3

log10=log2.5
log10=log2+log5
1=log2+0,69
log2=1+0,69
log2=0,31

log18=
log2.3.3=
log2+lo3+log3=
0,31+0,47+0,47=
1,25