Textbook
Extending the Frontiers of Mathematics: Inquiries into Proof and AugmentationISBN: 978-0-470-41222-0
Paperback
192 pages
June 2008, ©2007
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Offers puzzles and patterns as precursors to proofs
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The “prove and extend or disprove and salvage” instruction is repeated, providing a consistent framework for approaching the problems
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Investigative in nature, this discovery-based text leads but doesn’t tell
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Brevity gives it flexibility; it can be used as either a core or supplementary text
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Highly engaging writing style that is informal and humorous