Jika f(x2 + 1) = 2log x + 1, nilai f(17) + f (5) = ... Dijwb ya pkai cara

LogAritMa

f(x² + 1) = ²log x + 1

f(17)
x² + 1 = 17 ---> x = 4

f(5)
x² + 1 = 5 ---> x = 2

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