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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,560

New Page: Finding Maxima and Minima using Derivatives

Please let me know what you think, anything I may have got wrong, suggestions, etc,

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,020

hi MathsIsFun,

Good page, thanks.

When I was at school, my teacher wrongly called a saddle point, a 'point of inflexion' and I think this confusion is widespread. Would you be able to add a footnote about inflexion (or inflection if you prefer) to clarify ?

http://en.wikipedia.org/wiki/Point_of_inflexion

Bob

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 95,982

Hi MIF;

Good page. Please expand on the inflection points if you have the time.

**In mathematics, you don't understand things. You just get used to them.**

**If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,922

Hi MIF

Nice page.

You can maybe add that the better way of finding out if an extremum is a maximum or a minimum is looking at the sign changes at the zeros of the first derivative. It works for any function continuous between the two zeros.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

The knowledge of some things as a function of age is a delta function.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,560

Thanks Guys! Good suggestions all.

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**Brainwave****Member**- Registered: 2013-12-10
- Posts: 2

Bobbym I love your words " if you cannot overcome with talent, overcome with efforts."

"MATHEMATICS", the birth place of great THINKERS.

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,560

Wrote a page on Inflection Points ... created new topic for you guys to comment on: http://www.mathisfunforum.com/viewtopic.php?id=20306

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