Diketahui fungsi : f(x) = 4x+5, g(x) = 2x-1, h(x) = 2x tentukanlah : a. (fog) (x) =... b. (fogoh) (2) =...

jawab
f(x)= 4x + 5
g(x) = 2x - 1
h(x)= 2x

(fog)(x)= f{g(x)} = f(2x -1) =4(2x -1) + 5= 8x  +1
(fogoh)(2)= (fog)(2(2)) = fog(4) = f(2(4)-1) = f(7)= 4(7) +5 = 33