Diketahui f(x)=(ax+b)/(cx+d), a, b, c, d, x e R, cx+d=/=0,

Diketahui f(x)=(ax+b)/(cx+d), a, b, c, d, x e R, cx+d=/=0, dan g(x)=px+q, p, q, x e R.a. Apakah (fof^(-1))(x)=(f^(-1)of)(x)=I(x)=x?b. Apakah (f^(-1))^(-1)(x)=f(x)?