Diketahui fungsi f : x = 2x+5 dan (fog)(x) : x = 13-2x Tentukan fungsi (gof)(x)

Fungsi komposisi

f(x)= 2x+ 5
fog(x)= 13 - 2x

2. g(x) + 5 = 13 - 2x
2 . g(x) = 13 - 2x - 5
2. g(x) = 8 - 2x
g(x)= 1/2 (8 - 2x)
g(x)= 4 - x

gof(x)=  g(2x+5) = 4 - (2x+5)
gof(x)= 4 - 2x - 5
gof(x) = -2x - 1