Question

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

Answer 1

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