jika f(x)=x-6 dan g(x)=x²-2x-24 tentukan(F o G) (5)

f(x) = x - 6
g(x) = x² - 2x - 24

f o g (x) = f(g(x)) = f(x² - 2x - 24)
f o g (x) = x² - 2x - 24 - 6
f o g (x) = x² - 2x - 30

Maka
f o g (5) = 5² - 2(5) - 30
f o g (5) = 25 - 10 - 30
f o g (5) = -15

(f o g)(5) =f(g(5)
=f(5²-2.5-24)
=f(-9)
=-9-6
= -15