Respuesta :

Hosein
its horizontal is
[tex]y = - 1[/tex]
so it will be
[tex]g(x) = f(x) - 1[/tex]
put one of points in
[tex]g(x) = {3}^{x + a} - 1[/tex]
you will find a
[tex]g(x) = {3}^{x - 2} - 1[/tex]