Let f(x)=1x4\displaystyle {f{{\left({x}\right)}}}={\frac{{{1}}}{{{x}-{4}}}} and g(x)=1x8\displaystyle {g{{\left({x}\right)}}}={\frac{{{1}}}{{{x}-{8}}}}.

Give the domain of fg(x)\displaystyle {f}\circ{g{{\left({x}\right)}}}. Use interval notation and give values using integers or reduced fractions.