Diketahui f(x)=2x-1 dan g(x)=3x+5 . Tentukan komposisi fungsi berikut! A. (f o g)-1 (x) B. (g o f)-1 (x) C. (f o g)-1 (1) D. (g o f)-1 (-2)

A. (f o g)(x) =f (g (x) =2 (3x+5)-1=6x+9
(f o g)^-1 (x)=..
misalkan y=6x+9
6x=y-9
x=(y-9)/6
(f o g)^-1(x)=(x-9)/6
b.(g o f)^(x) = g (f(x)=3 (2x-1)+5 =6x+2
misalkan y =6x+2
6x=y-2
x=(y-2)/6
(g o f)^-1 (x)=(x-2)/6
c. (f o g )^-1 (1) = (1-9)/6 = -8/6
d. (g o f)^-1 (2) =(2-2)/6 =0