Bair, JacquesHenry, Valerie2024-09-042024-09-042007-12-01Teaching Mathematics and Computer Science, Vol. 5 No. 2 (2007) , 377-3841589-7389https://hdl.handle.net/2437/379615The method of fluxions was originally given by Newton among others in order to determine the tangent to a curve. In this note, we will formulate this method by the light of some modern mathematical tools: using the concept of limit, but also with hyperreal numbers and their standard parts and with dual numbers; another way is the use of virtual microscopes both in the contexts of classical and non standard analysis.application/pdffluxionstangent lineshyperreal numbersdual numbersvirtual microscopesnon standard analysisfolyóiratcikkOpen AccessJacques Bair and Valerie Henryhttps://doi.org/10.5485/TMCS.2007.0168Teaching Mathematics and Computer Science25Teach. Math. Comp. Sci.2676-8364