diketahui f(x)= 4x+1 dan g(x)= 2x + a. jika (fog) (x) = (gof) (x) , maka nilai Dari a adalah..

f (x) = 4x + 1
g (x) = 2x + a

fog (x)
= f (g (x))
= f (2x + a)
= 4 (2x + a) + 1
= 8x + 4a + 1

gof (x)
= g (f (x))
= g (4x + 1)
= 2 (4x + 1) + a
= 8x + 2 + a

fog (x) = gof (x)
8x + 4a + 1 = 8x + 2 + a
4a - a = 8x - 8x + 2 - 1
3a = 1
a = 1/3

semoga membantu
happy for help you