Question

Considerando log 3 = 0,48, qual o valor de log 30 000. *
a) 1,14
b) 1,44
c) 2,10
d) 4,48

Answer 1

Resposta:

log 30000

log 3*10000

# usei log a*b = log a + log b

=log 3 + log 10000

=log 3 + log 10⁴

# usei log a^b = b * log a

=log 3 +4* log 10

# usei log[a] a =1    ==> log 10 = log₁₀ 10 = 1

=0,48 + 4 *1

= 4,48

letra D