di ketahui f(x)=x-1 dan(fog)(x) =2x^2+4 maka(g)(x) =..

f(x) = x - 1
f(g(x)) = g(x) - 1 ..............(persamaan 1)

(fog)(x) = f(g(x))
f(g(x)) = 2x² + 4............(persamaan 2)

persamaan 1 = persamaan 2
f(g(x)) = f(g(x))
g(x) - 1 = 2x² + 4
g(x) = 2x² + 5