Question

if f(x)=x/x+1 so prove that fa/b/fb/a=a/b

Answer 1

f(a/b)=(a/b)/(a+b)/b=a/a+b...........(1)
f(b/a)=(b/a)/a+b/a=b/a+b............(2)
divide (1)/(2)=a/b
proved