Question

Ditentukan f(x) = 5 - 2x, g(x) = x + 6,dan h(x) = x - 4. Jika ( f o g o h)^-1(k) = 2,nilai k adalah.....
Please,dengan cara penyelesaian,.............

Answer 1

f(x) = 5 - 2x, g(x) = x + 6,dan h(x) = x - 4. Jika ( f o g o h)^-1(k) = 2,nilai k = ...
h^-1(x) = x + 4, g^-1(x) = x - 6 dan f^-1(x) = -1/2(x - 5)
(fogoh)^-1(x) = (fog)(x+4)
                 = f(x + 4 - 6)
                 = f(x - 2)
                 = -1/2(x-2-5)
                 = -1/2(x - 7)
(fogoh)^-1(k) = -1/2(k - 7)
         2      = -1/2)(k - 7)
         -4    = k - 7
k = 7 - 4 = 3  tidak ada jawaban yang benar di PG nya