Question

Determine o valor de "x"​

Answer 1

Resposta:

9^[1/(3x-1)]=9^(x-1)       .......3x-1 >0  ==>x>1/3

1/(3x-1) =x-1

1=(x-1)*(3x-1)

x*(3x)-x-3x+1 =1

x*(3x)-x-3x=0

3x²-4x=0

x*(3x-4)=0

x=0  ==> ñ serve   ==>3*0-1 <0

3x-4=0  ==>x=4/3  é a resposta