Jika(fx+2)=4x+1 dan (fog)(x)=4x+17, makag(4) adalah..

F(x+2) = 4x+1
misalkan x+2 = a maka x = a-2
f(a) = 4(a-2) + 1
f(a)= 4a – 8 + 1
f(a)= 4a – 7
f(x) = 4x – 7

(fog)(x) = 4x+17
4g(x) – 7 = 4x + 17
4g(x) = 4x + 17 + 7
4g(x) = 4x + 24
g(x) = x + 6

g(4) = 4+6
g(4) = 10