Question

resolva a equacao:
log 1/3 (x-1)= -2                     

Answer 1

(1/3)^-2 = x-1
3^2 = x-1
9 = x-1
x=10

Answer 2

log[1/3](x-1)=-2
[1/3]^-2=x-1
3²=x-1
x-1=9
x=9+1
x=10

S={10)