jika g (x) =4x-3 dan (fog)(x)=8x+1 maka f (-3)=

fog(x) = f [gx)] = 8x + 1
f (4x - 3) = 8x + 1
f(x) = 8(x+3 / 4) + 1
= 2x + 6 + 1
= 2x + 7
f(-3) = 2.(-3) + 7 = -6 + 7 = 1