confirm that (f°g)(x)=(g°f)(x)=x
Hello,It is enough to prove that g(x)=f(^-1)(x)f(x): y=(2x+3)/(x+4)f(^-1): x=(2y+3)/(y+4)==>xy+4x=2y+3==>y(x-2)=3-4x==>y=(3-4x)/(x-2)==>y=(4x-3)/(2-x)= g(x)
