fungsi f:R-R dan g:R-R ditentukan oleh F(x)=2x-3 dari g(x)=x²-4 tentukan A.-(Fog) (x) -(Fog) (3)

Kelas 10 Matematika
Bab Fungsi Komposisi

a] (fog) (x) = f(x² - 4)
(fog) (x) = 2 (x² - 4) - 3
(fog) (x) = 2x² - 8 - 3
(fog) (x) = 2x² - 11

Maka, - (fog) (x)
= - (2x² - 11)
= -2x² + 11

b] - (fog) (3)
= -2 . 3² + 11
= -2 . 9 + 11
= -18 + 11
= -7