I realize that a variable can take any value, but some mathematical
functions limit the possible values. It's been a long time for me, but I
thought this particular function was stated as Sigma 1 to n = n*(n + 1)
/ 2 (where n > 1). You don't really have a series if n is not > 1.
Or it might have been (where n <> 0).
If you did allow the series to run backward (from 1 to 0) you would get
Sigma 1 to 0 = 0 * 1 / 2 which evaluates to 0.
Dale Erwin
Jr. 28 de Julio 657, Depto. 03
Magdalena del Mar, Lima 17 PERU
http://leather.casaerwin.org
On 6/21/2013 5:06 PM, Brian Barker wrote:
At 16:01 21/06/2013 -0500, Dale Erwin wrote:
I don't think that n can be zero.
Oh, it can - as can x, y, z, or whatever! As is well known in
mathematics, a variable can take any value.
Brian Barker
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