Diketahui : f (x) = 3x - 7 f (x) = 5 - 2x Tentukan a) (fog) (x) b) (gof) (x)

f(x) = 3x - 7
g(x) = 5 - 2x

A) (f o g) (x)
= f(5 - 2x)
3(5 - 2x) - 7
= 15 - 6x - 7
= 8 - 6x

B) (gof)(x)
= g(3x - 7)
= 5 - 2(3x - 7)
= 5 - 6x + 14
= 19 - 6x