F(x) = 2x+ 1 / x (F o g) (x) = x-2 G(3) = ?

f(x) = (2x + 1)/x

(fog)(x) = x - 2
(2 g(x) + 1) / g(x) = x - 2
Kali silang
2 g(x) + 1 = x . g(x) - 2 g(x)
2 g(x) - x g(x) + 2 g(x) = -1
(4 - x) g(x) = -1
g(x) = 1/(x - 4)

g(3) = 1/(3 - 4)
g(3) = -1