The Strange Logic of Random Graphs (Algorithms and

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Mathematical Intelligencer, 10(4): 30-31 (1988). ����� Dorrie, Heinrich, 100 Great Problems of Elementary Mathematics: Their History and Solution (New York: Dover, 1965). Toss the racket attempting to make it rotate about the y axis. Which ones 27.2.1 Exercise Which of the following sentences say the same thing? a) If a real number is positive, it has a square root. b) If a real number has a square root, it is positive. c) A real number is positive only if it has a square root. d) Every positive real number has a square root. e) For a real number to be positive, it is necessary that it have a square root. f) For a real number to be positive, it is sufficient that it have a square root. 27.2.2 Exercise Suppose you have been told that the statement P ⇒ Q is false.

Pages: 168

Publisher: Springer; Softcover reprint of hardcover 1st ed. 2001 edition (February 19, 2010)

ISBN: 3642074995

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