Question

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

Answer 1

Verified answer

F(17) = ...
x² + 1 = 17
x² = 17 - 1
x² = 16
x = √16 = 4
f(17) = ²log (4+1)
f(17) = ²log 5
f(5) = ...
x² + 1 = 5
x² = 5 - 1
x² = 4
x = √4 = 2
f(5) = ²log (2+1)
f(5) = ²log 3
f(17) + f(5) = ²log 5 + ²log 3 = ²log (5×3)
= ²log 15