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Pigeonhole principle..please help!
Posted:
Oct 9, 2010 9:59 AM


Consider 2n+1 real numbers greater than 1 and less than 2n. Prove that we can always nd 3 numbers among them that are the sides of a triangle.
Inside a unit cube,30 points are given prove that among them there are 2 points at a distance no greater than 1/(squareroot)2



