diketahui f(x+2)=4x-9 dan(gof) (x)=1/4x-16 xtidak sama dengan 4 tentukan rumus fungsi f, rumus fungsi g, dan rumus (fog) (x)

f(x+2) =4x-9
f(x) = 4f'x - 9
= 4(x-2)-9
= 4x-17

gof = 1/ 4x-16
g(fx) = 1/ 4x-16
g(4x-17) = 1/ 4x-16
g(x) = 1/ 4g'x-16
=1/ 4(x+17/4) - 16
= 1/ x+17-16
= 1/ x+1

fog = f(gx)
= f(1/ x+1)
= 4gx-17
= 4(1/ x+1) - 17
= 4/x+1 - 17
= 4-17x-17/ x+1
= -17x-13 / x+1