We show a way to perform a content analysis for a problem situation about the anti-derivative that allows to explore and characterize the primary mathematical objects through the tools proposed in the Ontosemiotic Approach to Knowledge (OSA), the results obtained from the problem situation and the solution to it provide knowledge to teachers regarding another way to perform content analysis through ontosemiotic analysis, helping also to characterize the understanding of mathematical object.
Key words: Content analysis, antiderivative, validity, ontosemiotic approach, understanding.
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