f(x)=2x-3 (g-f)(x)=2x+1 dit:g(x) help me pleas

Materi fungsi

Soal nomor 1
(g-f)(x) = 2x+1
g(x) - f(x) = 2x+1
g(x) = 2x+1 + 2x - 3 = 4x - 2 <<

Soal nomor 2
(f.g)(x) = x/2 + 1
f(x) g(x) = x/2 + 1
2x . g(x) = x/2 + 1
g(x) = (x/2 + 2/2) / 2x = (x + 2)/4x