Dik:fx=x+4 gx=2x Dit: penyelesaian a.fog invers x B.gof invers x

f(x)= x+4
g(x) = 2x
dit : a) fo(g(x))' = 1/2x+4
b) gof(x)' = 2(x+4)
= 2x+8
=1/2x+8