arithmetic
Posts:
106
From:
venezuela
Registered:
1/23/06
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Re: cube root of a given number
Posted:
Jul 21, 2007 5:13 PM
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On 17 jul, 04:38, "sttscitr...@tesco.net" <sttscitr...@tesco.net>
wrote:
> On 16 Jul, 23:24, gwh <ghug...@cei.net> wrote:
>
> > On Jul 14, 10:30 pm, arithmeticae <djes...@gmail.com> wrote:
> > Maybe not in "any text on numbers", but back in 1945 I purchased a
> > copy of "Handbook of Engineering Fundamentals", by Eshbach, and the
> > cube root extraction scheme described there was precisely the same as
> > the scheme described on one of the links given on the above website. I
> > used that method lots of times in my engineering career when I needed
> > more precision than my trusty log-log duplex decitrig slide rule was
> > able to give me.
>
> Yes, you can find interesting
> pre-computer techniques in
> old maths books - even the" texts on
> numbers". Was there a reference to
> to the originator of the method ?
CORRECTION:
You can find TRIAL-&-ERROR methods based basically on Geometry, but
you will never
find SIMPLE AND NATURAL ARITHMETICAL METHODS based only on number
itself as those shown
in my webpages, and that is a HUGE difference.
Moreover, those old TRIAL-&-ERROR methods you mentioned worked
properly for square roots,
however, when dealing with higher roots all of them were just
PRECOMPUTING NIGHTMARES.
For not to mention that my methods hold high convergence speed (as
desired), which is something
that you cannot say about all those PRECOMPUTING NIGHTMARES you
mentioned.
Indeed, I think you really don't know what you are talking about, for
sure.
The issue on those old and well-known root-solving methods is fully
explained in my webpages, and
many comparisons are shown in my book and webpage.
That's the reason my posting was entitled "DEDICATED TO YOUNG MATH
STUDENTS". Some people
is not willing even to read any single bit of some new stuff, they
just care about themselves. Fortunatedly youngs are another very
different thing.
When I mention the word "Young" I am not referring to the word "AGE",
I am just referring to "Mental State"
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