diketahui f(x)=2x - 1 dan g(x)=x+4 tentukan a) (gof) (x) b) (fog) (x)

A||

(g o f) (x) = g (f(x))
                = 2x - 1 + 4
                = 2x + 3

B||

(f o g) (x) = f (g(x))
                = 2 (x + 4) - 1
                = 2x + 8 - 1
                = 2x + 7


Fighting!