Resumo

LACUES APUD, Eduardo Mario; DIAZ MORENO, Leonora  e  HUERTAS, Juan Antonio. Interactions between conditional propositions and mathematical symbol systems in a mathematical task. Educ. mat. [online]. 2021, vol.33, n.1, pp.268-295.  Epub 06-Dez-2021. ISSN 2448-8089.  https://doi.org/10.24844/em3301.10.

Results from an investigation with freshmen in a first year university Calculus course are presented, which was designed to inquiry about their use of conditional propositions (necessary condition, sufficient condition) and its relation with the Mathematical Symbol System used to present information about these propositions (graphic register, algebraic register). The questions formulated in this instance are similar to those that must be answered in activities related with the notion of function. Differences in students’ performance indicate that tasks about necessary condition on graphic register result significantly easier than others; there is evidence of a better performance in tasks on graphic register in relation with algebraic one, and in tasks about necessary condition with respect to sufficient condition.

Palavras-chave : Necessary condition; Sufficient condition; Mathematical Symbol Systems; Representations registers; Functions.

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