dik: f(x)=2x+5 g(x)=-4x+1 h(x)=x-2 Tentukan a) (f°g)°h(x) b) (g°h°f) (x) c) (h°g) (3) d) (f°g) (2)

a) (f°g)°h(x)=2(-4x+1)+5=-8x+7=-8(x-2)+7=-8x+23

b) (g°h°f)(x)=-4(x-2)+1=-4x+9=-4(2x+5)+9=-8x-11

c) (h°g)(3)=(-4x+1)(-3)=12x-3=12(3)-3=33

d) (f°g)(2)=2(-4x+1)+5=-8x+7=-8(2)+7=-9