jawab pakek jalannya pleasee

f(x) = 9^x /(9^x + 3)

Misal : a = 9
f(x) = a^x / (a^x + √a)
f(1 - x) = √a / (a^x + √a)

f(x) + f(1 - x) = 1

▶
f(1/2007) + f(2/2007) + ... + f(2006/2007)
= [f(1/2007) + f(2006/2007] + ... + [f(1003/2007) + f(1004/2007)]
= 1 + 1 + ... + 1
= 1 × 2006/2
= 1003