f(x) =3x-4 g(x) =2x+p (f°g) (x)=(g°f) (x) Maka nilai p adalah?

i. fog(x) = f(g(x))
= f(2x+p)
= 3(2x+p)-4
= 6x+3p-4
ii. gof(x) = g(f(x))
= g(3x-4)
= 2(3x-4)+p
= 6x-8+p

fog(x) = gof(x)
6x+3p-4 = 6x-8+p
3p-p = -8+4
2p = -4
p = -2