jika f(x) = 2x+7 g(x) = 5x-4 tentukan a. (fog) - 1 (x) b. (gof) -1 (x)

a. (fog) - x
= 2(5x-4) + 7 - x
= 10x - 8 + 7 - x
= 9x - 1

b. (gof) - x
= 5(2x+7) - 4 - x
= 10x + 35 - 4 - x
= 9x + 31

semoga membantu :)

Semoga membantu dan bermanfaat ya.