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Magnification and local linearity: new technologies in the teaching of the concept of derivative. (Portuguese. English summary)
TEMA, Tend. Mat. Apl. Comput. 3, No. 2, 101-110 (2002).
Summary: We propose an alternative initial approach for the concept of derivative. The authors have been testing this approach with first calculus course students and secondary math teachers. Based upon a theoretical framework introduced by David Tall, the authors present the derivative using local straightness notion for visualizing function graphs generated by computers.
Classification: I45 D45 U75
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