Diketahui g(x)=2x+1 dan g(f(x))=10x-7.Carilah : A.f(x) B.f(10x-7) C.f(2)

(g o f)(x) = 2(f(x)) + 1 = 10x - 7
2(f(x)) = 10x - 8
f(x) = 5x - 4

f(10x -7) = 5(10x - 7) - 4
50x - 35 - 4
50x - 39

f(2) = 5.2 - 4
10-4
6