Question

THE NO.(II) I DIDN'T GET f(3)=-f(9)
instead i got f(3)=f(9)..NO LINK PLS
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Answer 1

`f(3)=-f(9)`

Explanation:

We know that f(6) = 0 from (i), so let's do x = 3.

`f(3+3)=f(3)+f(9)`

`0=f(3)+f(9)`

Therefore,

`f(3)=-f(9)`

I hope it helps you!