Question

Dada a função f(2x) = 2f(x) e f(8) = 20, determine o valor de f(1)+f(2)/f(4) $\frac{f(1)+f(2)}{f4}$

Answer 1

2x=8 x=4 f(2.4) = 2f(4) =20 , f(4) = $\frac{20}{2}$ f(4)=10

2x=4 x= 2 f(2.2) = 2f(2) = 10 , f(2) = $\frac{10}{2}$ f(2) = 5

2x=2 x=1 f(2.1) = 2f(1) = 5 f(1)= $\frac{5}{2}$

$\frac{\frac{5}{2}+5}{10} = \frac{15}{20}$