Diketahui fungsi f:R dengan f(x)= 4x+2 dan fungsi g:R ➡ R dengan g(x) = 2x-7 tentukanlah : a. gof(8) b. fog(2)

a.
(gof)(8)
= 2(4(8) + 2) - 7
= 2(34) - 7
= 68 - 7
= 61

b.
(fog)(2)
= 4(2(2) - 7) + 2
= 4(-3) + 2
= -12 + 2
= -10

g○f (x) = 2(4x+2)-7
= 8x + 4 - 7
= 8x - 3
g○f (8) = 8×8 - 3
= 64 - 3
= 61
f○g (x) = 4(2x-7) + 2
= 8x - 28 + 2
= 8x - 26
f○g (2) = 8×2 - 26
= 16 - 26
= -10