Summing Function Message #1 Posted by Jim Yohe on 27 Mar 2011, 9:08 p.m.
Is there a similar function to the HP27S Summing {sigma} Function (page 108 of Owner's Manual) but available on the HP42S or the HP32SII and in the related owner's manual(s)? I can't seem to find one but I could have overlooked it.
FYI, from HP27S manual:
{sigma}(counter variable : starting value : ending value : step size : algebraic expression)
Definition: Sums values of the algebraic expression for values of the counter variable. The counter variable starts with the starting value and is incremented in steps to a final ending value.
I'd like to try out the following equation in SOLVE on my 42S and 32SII if possible.
Solve for PI' (since PI is already a function):
PI'=(6÷SQRT(3))*{sigma}(I:0:LAST:1:(1)^I÷((2xI+1)x3^I))
It takes a value of 21 in variable LAST to produce 12 digits of accuracy (last digit rounded up) for PI'.
Ref: The history of the approximation of the number PI; 4.1. Gottfried Wilhelm Leibniz (16461716); Scholz, Werner; http://cwscholz.net/projects/fba/fba.html
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Confounded ... how, if even possible, do I embed special characters like the {sigma} symbol (Σ) into a forum message? :/
