i have a question

Revision en1, by p__ce1052, 2022-10-20 19:24:32

f(x) = f(y)+f(x-y)+2y (1<=y<=x/2) f(1)=1

i know that f is about xlogx when y is x/2

but i cant prove xlogx is maximum

can someone help me? why cant it be bigger?

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en1 English p__ce1052 2022-10-20 19:24:32 189 Initial revision (published)