Let $a;b;c;d$ be positive numbers. Prove that,
\[1 < \frac{a}{a+b+d} + \frac{b}{a+b+c} +\frac{c}{b+c+d} +\frac{d}{a+c+d} < 2\]
Camp exam problem 3
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Use $L^AT_EX$, It makes our work a lot easier!
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: Camp exam problem 3
needs just 2 crux moves.those are the first and the last move. 
i don't know should have i hidden these.but though did it if someone who hasn't done it yet would like to catch out the second one by seeing the first one or vice versa.
POSTING THIS I GIVE A SPECIAL THANKS TO A GOOD FRIEND OF MINE.
i don't know should have i hidden these.but though did it if someone who hasn't done it yet would like to catch out the second one by seeing the first one or vice versa.
POSTING THIS I GIVE A SPECIAL THANKS TO A GOOD FRIEND OF MINE.
\[\sum_{k=0}^{n-1}e^{\frac{2 \pi i k}{n}}=0\]
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.