Dik =f(×)=4x-1 dan 9(×)=x²+2 tentukan fog(-9)

[Fungsi Komposisi]

Fog(x) = f(g(x))
Fog(-9) = f(g(-9))
Fog(-9) = f(83)
Fog(-9) = 4(83) - 1
Fog(-9) = 331

(fog)(x)
f(g(x))
f (x^2+2)
4(x^2+2) + 2
4x^2+2+2
4x^2+4 = (fog)(x)
(fog)(-9) = 4(-9)^2 +4
= 4(81) + 4
= 324 + 4
= 328