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On a Much-Neglected Equation

Published online by Cambridge University Press:  03 November 2016

E. G. Phillips
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Extract

In Analytical Geometry there is a most useful equation which is very rarely used and seems to be very unfamiliar to candidates in school examinations. It is the equation of the chord of a conic whose mid-point is (x1, y1). Speaking from a long experience as an examiner, I am always astonished at the unfamiliarity of candidates with this particular equation. If one sets a question asking the candidates to obtain this equation and follows this with a simple rider designed to show its usefulness, even if the candidates know how to find the equation, they rarely solve the rider by means of it.

Type
Research Article
Information
The Mathematical Gazette , Volume 25 , Issue 265 , July 1941 , pp. 144 - 146
Copyright
Copyright © Mathematical Association 1941 

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