Question

se log 7=0,85 e log de 2= 0,3, calcule: log de 14 na base 8 e log de 10 na base 7.

Answer 1

Resposta:

a) log₈ 14

=log (2*7) /log 8

=(log 2 + log 7)/log 2³

=(log 2 + log 7)/ (3*log 2)

=(0,3+0,85)/(3*0,3)

=1,15/0,9 =115/90=23/30

b)log₇ 10

=log 10/log 7

= 1/0,85

= 1/(85/100)

=100/85

=20/17