Question

Sendo log a=2, log b= 3 e log c= 4, determine o valor das expressões:

a) log (a.b.c)       b) log  a.c

                                     b

          

                         

 

Answer 1

me redimindo...

a) log (a.b.c) = 2+3+4 = 7
b)
$log_{b} a.c$ = x
10^2 => A =100
10^3 => B =1000
10^4 => C =10000

$log_{10^{4}} 10^{2}.10^{3}$ = x

$(10^{4})^{x} = 10^{5}$
4.X = 5
x = 5/4