jika f(x) = 2x + 1 dan g(x) = 4 - 1/2x maka (g•f)(x) =... please bantu ya

jawab

gof(x) = g { f(x) } = g (2x+1)
gof(x)= 4 -1/2 (2x+1)
gof(x) = 4 -x - 1/2
gof(x)= 3 1/2 - x