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Problem 2: a) Show that if you pick three books from a comic store containing just Marvel Comics and DC Comics, you must get either

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Problem 2: a) Show that if you pick three books from a comic store containing just Marvel Comics and DC Comics, you must get either a pair of Marvel Comic books or a pair of DC Comic books b) Prove or disprove that the product of a nonzero rational number and an irrational number is irrational

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Advances In Spatial Databases 5th International Symposium Ssd 97 Berlin Germany July 15 18 1997 Proceedings Lncs 1262

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