jika (gof)(x) = 1/2x-1 dan g(x) = 2x-1,maka rumus fungsi f(x) adalah

[tex]g(x) = 2x - 1 \\ (gof)(x) = g(f(x)) = \frac{1}{2x - 1} \\ 2(f(x)) - 1 = \frac{1}{2x - 1} \\ 2(f(x)) = \frac{2x}{2x - 1} \\ f(x) = \frac{2x}{4x - 2} = \frac{x}{2x - 1} [/tex]