jika (fog)(x)=7-x dan g~1(x)=5-x maka f(x) sama dengan

Kelas 10 Matematika
Bab Fungsi Komposisi

g⁻¹ (x) = 5 - x
y = 5 - x
x = 5 - y
(g⁻¹)⁻¹ (x) = 5 - x
g(x) = 5 - x

(fog) (x) = 7 - x
f(5 - x) = 7 - x
f(5 - x) = 2 + (5 - x)
f(x) = 2 + x