jika f(x) = 1/2x-1 dan g(x) = 2x+4 maka nilai (gof) invers (10) adalah tolong jawab besok dikumpul

(gof)(x)=g(f(x))
=g(1/2x-1)
=2(1/2x-1)+4
=2/2x-1+4/2x-1
=2+4/2x-1
=6/2x-1

y=6/2x-1
y(2x-1)=6
2xy-y=6
2xy=6+y
x(2y)=6+y
x=6+y/2y

(gof)^-1(x)=6+x/2x

(gof)^-1(10)=6+10/2.10
=16/20
=4/5

maafkan kalo salah :)