G(x) = x + 1 / x- 1 ( g o f) ( x) = x + 2 / x F(2) = ?

g(x) = x + 1 / x - 1.
g o f (x) = x + 2 / x
g { f (x) } = x + 2 / x
f (x) + 1 / f (x) - 1 = x + 2 / x
{ f(x) + 1 } x = { f(x) - 1 } (x +2)
x.f(x) + x = x.f(x) - x + 2f(x) -2
x = -x + 2f(x) -2
2f(x) = 2x + 2
f(x) = (2x + 2)/2
f(x) = x + 1