Question

Resolva as equações:
a) log ³ x = 4
b)log x 1/9 = 2

Answer 1

a) log de x na base 3 igual a 4

Log x = 4
      3
   x = 3^4
    x = 81



b)
logx(1/9) = 2

logx(9) = -2 

log(9)/log(x) = -2

log(9) = -2log(x) 

log(1/9) = 2log(x)

log(1/9) = log(x²) 

x² = 1/9 ,  x = 1/3