Question

if f(x)=(3+x)/(x-3), what is f(a+2)

Answer 1

$\bf f(x)=\cfrac{3+x}{x-3}\qquad \qquad f(a+2)=\cfrac{3+\boxed{a+2}}{\boxed{a+2}-3}\implies f(a+2)=\cfrac{5+a}{a-1}$