Question

Resolva as equações exponenciais:
a)(1/3)^2x-1 = 1/243
b)25^x + 125/6 = 5^x+1
c) 3^2x + 2 . 3^x - 15 = 0

Answer 1

a) (1/3) ^2x+1 = (1/3)^5
      2x + 1= 5
      2x =5-1
      2x = 4
      x=4/2
      x = 2