Jika g(x) = -2x+1 dan (fog) (x) = -4 +1 maka f^-1 (2x-1) adalah

(fog)(x) = -4x+1
f(-2x+1)=-4x+1
misal
t = -2x+1
2x = -t+1
x = -t+1 / 2
f(x) = -2(-t+1 / 2)+1
f(x) = -(-t+1)+1
f(x) = x

ditanya
f(2x+1)?
misal
t= 2x+1
2x=t-1
x=t-1 / 2

f(x) = t-1 / 2
f(x) = x-1 / 2