Ass,,,mohon bantuan nya ya kak...

maaf jika salah..semoga membantu :)

[tex] fog(x) = f(g(x)) \\ = f( \sqrt{2x}) \\ = \frac{2 \sqrt{2x} }{ {( \sqrt{2x} )}^{2} - 4} \\ = \frac{2 \sqrt{2x} }{ 2x - 4}[/tex]