Diketahui f(x) = 2x -1 dan g(x) = x-1 a. (fog) (x) b. (gof) (x) jawab :

a. (fog)(x)=f (g (x))
=f (x-1)
=2 (x-1)-1
=2x-2-1
=2x-3

b. (gof)(x)=g (f(x))
=g (2x-1)
=(2x-1)-1
=2x+1