jika f(×^2+1) = 2log x + 1 , nilai f(17) + f(5) =.... beserta caranya pleaseeee buat besok , jam pelajaran pertama lagi

f(17) = f(x² + 1)
17 = x² + 1 ---> x = 4

f(5) = f(x² + 1)
5 = x² + 1 ---> x = 2

f(17) + f(5)
= (²log 4 + 1) + (²log 2 + 1)
= (2 + 1) + (1 + 1)
= 3 + 2
= 5 ✔