Jika f(x)=x+1/x dan g(x)=x-1/x, maka g(f(x)) adalah...

[tex]g(f(x)) = \\ g( \frac{x + 1}{x} ) = \frac{\frac{x + 1}{ x} -1}{ \frac{x + 1}{x} } \\ \frac{x + 1 - x}{ \frac{x + 1}{x}} \\ 1 \div \frac{x + 1}{x} \\ 1 \times \frac{x}{x + 1} = \frac{x}{x + 1}[/tex]