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Educational Studies in Mathematics

, Volume 33, Issue 3, pp 321–330 | Cite as

To Define Or Not To Define: The Case Of (-8)1/3

  • Dina Tirosh
  • Ruhama Even
Article

Abstract

This paper discusses two possible approaches to (-8)1/3. The first is that (-8)1/3 = 3√(-8) = -2. The second is that (-8)1/3 is undefined. The pros and cons of each of these approaches are considered and some implications to teacher education are specified.

Keywords

Teacher Education 
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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Dina Tirosh
    • 1
  • Ruhama Even
    • 2
  1. 1.Dept. of Science Education, School of EducationTel-Aviv UniversityTel-AvivIsrael
  2. 2.Dept. of Science TeachingWeizmann Institute of ScienceRehovotIsrael

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