dik: f(x) = 2x+5 9(x)=x+2 dit:tentukan (g¤f)-1 (x)

F(x) = 2x + 5
G(x) = x + 2
(g o f) (x) = (2x + 5) + 2
(g o f) (x) = 2x + 7
Y = 2x + 7
2x = y - 7
X =(y - 7) / 2
(g o f)-¹ (x) = (x - 7) / 2