Diketahui Fungsi f: R->R dengan f(x)=x2-4x+2 dan fungsi g:R->R dengan g(x)=3x-7. Tentu kanlah. A. Gof B. Fog C. Gof (5) D. (Fog) (10)

A.
g o f (x) = g (f(x)
g o f (x) = g (x² - 4x + 2)
g o f (x) = 3(x² - 4x + 2) - 7
g o f (x) =3x² - 12x - 1

B.
f o g (x) = (3x-7)² + 4(3x - 7) + 2
f o g (x) = 9x² - 42x + 49 + 12x - 28 + 2
f o g (x) = 9x² - 30x + 23

C.
g o f (5) = 3(5)² - 12(5) - 1
g o f (5) = 75 - 60 - 1
g o f (5) = 14

D.
f o g (10) = 9(10)² - 30(10) + 23
f o g (10) = 900 - 300 + 23
f o g (10) = 623