Question

log 1=0; log2= 0,301; log 3= 0,477; log 5= 0,699; log 7=0,854. calcule cada logaritmo abaixo:
a)log 4
b)log 6
c)log20
d)log 14
e)log 21
1
f)log _
5

Answer 1

a)
log 4
log 2.2
log 2 + log 2
0,301 + 0,301 = 0,602

b)
log 6
log 2.3
log 2 + log 3
0,301 + 0,477
0,778
 
c)
log20
log 2.2.5
log 2 + log 2 + log 5
0,301 + 0,301 + 0,699
1,301

d)
log 14
log 7.2
log 7 + log 2
0,854 + 0,301
1,155

e)
log 21
log 7.3
log 7 + log 3
0,854 + 0,477
1,331

=)