diketahui fungsi-fungsi f : R → R , g : R → R yang dirumuskan dengan f(x) = 2x - 7 g(x) = x2 - 5x + 1 . carilah (f o g)(x)= .... dan (g o f)(x)=.....

1. (fog) = f(g(x)) = 2 (x^2-5x+1) -7 = (2x^2 - 10x + 2) -7 = 2x^2 -10x -5

2. (gof) = g(f(x)) = (2x-7)^2 - 5 (2x-7) + 1 = (4x^2-28x+49) -(10x-35) + 1 =4x^2-28x+49-10x+35+1 = 4x^2-38x+85