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Mathematics 17 Online
OpenStudy (anonymous):

11 elements are chosen from the set S = f1; 2; 3; : : : ; 99; 100g. Show that, among these 11 numbers, there exists two of them (say x and y) which satisfy 0 < j p x 􀀀 p yj < 1. (Hint: Pigeonhole)

OpenStudy (anonymous):

satisfy 0<abs(sqrt(x)-aqrt(y))<1

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