Respuestas

2013-07-17T15:49:01+02:00
Hola!!

1)  
2.logx = 3 + log x -log10
  2.logx = 3 +log x -1
  2logx = 2 +log x

2logx -logx = 2
logx(2 -1 ) =2
 logx = 2  
x = 10^2   x =100
2) 3log x - log 32 = log x -log 2

3logx -logx = log32 -log2
2logx = log 30

x^2 = 30

Saludos!!!
2013-07-17T16:49:39+02:00

1)   2 Log x = 3 + Log (x/10)
    Aplicando propiedades de logarítmod
     2 log x = 3 + log x - log 10
     2 log x - log x = 3 - 1
     log x = 2
            x = 10^2
            x = 100

2) 3 Logx - log 32 = log (x/2)
    3 log x - log 2^5 = log x - log 2
    3 log x - log x = - log 2 + 5 log 2
    2 log x = 4log 2
       log x = 2 log 2
            x = 10^(2.log 2)
            x = 100^log2
  log 2 = 0,3010
            x = 100^(0,3010)
            x = 3,999