THE TEACHING OF MATHEMATICS

THE TEACHING OF MATHEMATICS
Why is it not true that $0.999\ldots<1$?
Petr Eisenmann

Abstract

The contribution describes three basic obstacles preventing students from understanding the concept of infinite series in teaching of mathematics and provides means to their removal.

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Keywords: Infinite series; obstacle; limit of a sequence; potential and actual perception of the infinite limit process; the relation of phylogenesis and ontogenesis.

Pages:  35$-$40     

Volume  XI ,  Issue  1 ,  2008