Question 762503
{{{f(x) = x + 10}}}.....first find {{{f^-1(x)}}}

{{{f^-1(x)=x-10}}}

{{{(f o f^-1)(x)=x-10+10=x}}}

then

{{{(f o f^-1)(5)=5}}}

so, answer is  A.{{{ 5}}}