Answer
$f(g(x))= f(1/x)= x/(x^2+1)$
$Domain:x\ne0$
$g(f(x))= g(x/(1+x^2))=(1+x^2)/x$
$Domain: x\ne0$
Work Step by Step
$f(g(x))= f(1/x)= x/(x^2+1)$
$Domain:x\ne0$
$g(f(x))= g(x/(1+x^2))=(1+x^2)/x$
$Domain: x\ne0$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.