bantuin ya kakak kakak

(fog)(x) = f(g(x))
= f (1/x-1)
= (1/x-1)-2
y= (1/x-1)-2
= 1-2(x-1) dibagi x-1
= 1-2x+2 dibagi x-1
= -2x+3 dibagi x-1
f^-1(x) = -2x + 3 dibagi x-1