Jika f(x) = 3x^2 -2x - 1 dan g(x) = √x-3 maka (fog)(4) =

==> f(g(4))
==> f(g(4)=akar x-3 )
==> f(g(4)= akar 4-3 )
==> f( g(4) =1 )
==> f(1) = 3x^2 -2x -1
==> f(1) = 3(1)^2 -2(1) -1
==> f(1) = 3(1) -2(1) -1
==> f(1) = 3-2-1
==> f(1) = 0

(fog)(4) = f(g(4)
(fog)(4) = f(√4 - 3)
(fog)(4) = f(2 - 3)
(fog)(4) = f(-1)
(fog)(4) = 3(-1)² - 2(-1) - 1
(fog)(4) = 3(1) + 2 - 1
(fog)(4) = 3 + 2 - 1
(fog)(4) = 4

Jawabannya B. 4