Question 1205646
{{{f(x) = log (x) - 4 }}}

{{{g(x) = 1/(x+4)}}}

{{{g(f(x)) =g(log (x) - 4) =1/(log (x) - 4+4)=1/log (x)}}}


for what value(s) of {{{x}}} is {{{g(f(x))}}} undefined?

for {{{log (x)=0}}}  {{{g(f(x))}}} is undefined, and it will be if {{{x=1}}}