Diketahui : f(x) = 18² – 6x + 1 g (x) = x + 1Tentukan f(x) !​

Jawaban:

f(x) = 18x² – 42x + 25

Penjelasan dengan langkah-langkah:

f(x) = ((f•g)•g^-1)

g^-1 → g(x) = x + 1

y = x + 1

x = y – 1

g^-1 = x – 1

f(x) = ((f•g)•g^-1)

f(x) = 18(x – 1)² – 6(x – 1) + 1

f(x) = 18(x² – 2x + 1) – 6x + 6 + 1

f(x) = 18x² – 36x + 18 – 6x + 6 + 1

f(x) = 18x² – 42x + 25