Diketahui f(x) = 2x-7 Dan g(x) = 4- 3x. Jika (gof) (a) = 7. Nilai a....

f(x) = 2x - 7
g(x) = 4 - 3x

(g o f)(x) = 4 - 3(2x - 7)
               = 4 - 6x + 21
               = 25 - 6x

(g o f)(a) = 7
25 - 6a = 7
25 - 7 = 6a
18 = 6a
3 = a

semoga membantu :)