Question 107113
{{{(f o g(x))=f(g(x))}}}
{{{g(2)=4}}}
{{{f(g(2))=f(4)=1}}}
Now, I'm not sure if the {{{-1}}} exponent means the reciprocal or if you're implying the inverse. 
If you mean reciprocal, then
{{{(f o g(x))^-1=1/1=1)}}}
If you mean inverse, then find y such that 
{{{f(y)=1}}}}
Therefore then 
{{{(f o g(x))^-1=4)}}}
since f(4)=1.