tolong tentukan (gof)¯1(x)

(g o f)(x) = g(f(x))
= g(x - 2)
= -2(x - 2) + 1
= -2x + 4 + 1
= -2x + 5

y = -2x + 5
2x = 5 - y
x = 5 - y / 2

(g o f)-1(x) = 5 - x / 2

invers (gof)(x) itu jdnya invers (fog)(x)