g(x) = x-2 , ( f o g)(x) = 3x-1. Tentukan f(x+5).

Fog(x) = 3x - 1
f(x-2) (x) = 3x - 1

#Misal x - 2 = k
maka x = k + 2

sehingg :
f(k+2) (x) = 3x - 1
= 3(k+2) - 1
= 3k + 6 - 1
= 3k + 5

sehingga nilai f(x) adalah
f(k) = 3k + 5
f(x) = 3x + 5
f(x+5) = 3(x+5) + 5
= 3x + 15 + 5
= 3x + 20