Tentukan rumus fungsi f(x) bila diketahui (fog)(x) =x+4, g(x) =2x+1

g(x)=2x+1 => g-¹(x)=(x-1)/2
(fog)(x)=x+4
f(x)=((x-1)/2)+4=(x-1)/2 + 8/2 = (x+7)/2