Let f be any function that maps the set of real numbers into the set of
real numbers. Prove that there exist real numbers x and y such that
$f(x−f(y)) > yf(x)+x$
(I didn't use LaTeX.)
IMO SL-5(2009)
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Sazid Akhter Turzo
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Re: IMO SL-5(2009)
Why didn't you use LaTeX? It isn't that hard, just put a dollar sign before and after your equation, and done. For advanced symbols,the vocabulary is easy too.
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Nur Muhammad Shafiullah | Mahi
Use $L^AT_EX$, It makes our work a lot easier!
Nur Muhammad Shafiullah | Mahi
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nafistiham
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Re: IMO SL-5(2009)
* just click any equation you see in latex*Mahi* wrote:Why didn't you use LaTeX? It isn't that hard, just put a dollar sign before and after your equation, and done. For advanced symbols,the vocabulary is easy too.
* use the equation editor for learnig
* have a look over the links in '*Mahi*'s signature
it is really easy and looks really beautiful and tidy
\[\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0\]
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.
Using $L^AT_EX$ and following the rules of the forum are very easy but really important, too.Please co-operate.