Question

Diketahui f(x)=4x-1 dan (gof)(x)=5-2x,maka g(x)=.....

Answer 1

Sebenarnya mau batu laah..
Tapi jawabannya pun panjang-panjang kali..
Hufthuft

Answer 2

(g o f) = 5 - 2x
g(f(x)) = 5 - 2x
g(4x - 1) = 5 - 2x
misal 4x - 1 = p, maka 4x = p + 1 ==> x = (p + 1) / 4
g(p) = 5 - 2((p+1)/4)
g(p) = 5 - (p + 1)/2
g(x) = 5 - (x+1)/2