Dik : f(x) =x +2 9(×) =× -7 ×+6 Dit : a (fog) (-1) =.....? : b (gof) (3)=....?

f(x) = x - 2
g(x) = x - 7x + 6
Cari dulu g(-1) nya dan f(3)
g(-1) = (-1) - 7(-1) + 6
g(-1) = -1 + 7 + 6 = 12
f(3) = 3 - 2 = 1

a. (fog)(-1) = f(g-1)
= 12-2 = 10
b. (gof)(3) = g(f3)
= 1 - 7(1) + 6 = 0