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Squintics and the sinusoidal fallacy

Published online by Cambridge University Press:  01 August 2016

Ian Griffiths
Ian Griffiths*
Affiliation:
City of Stoke-on-Trent Sixth Form College, Stoke-on-Trent ST4 2RR
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Extract

Here is a published example of what I mean by the sinusoidal fallacy:

“The diagram shows the graph of f(x) = x(x–a)(x–2a). C is a maximum point on the curve and has coordinates (a/2, b) and D is a minimum point on the curve and has coordinates (3a/2,–b)”.

Type
Research Article
Information
The Mathematical Gazette , Volume 78 , Issue 483 , November 1994 , pp. 304 - 307
Copyright
Copyright © The Mathematical Association 1994

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References

1. Smith, , Ewart, , Examples in A-level Core mathematics, Stanley Thornes (1990).Google Scholar