Little explorations with HP calculators (no Prime)

03212017, 10:40 PM
(This post was last modified: 03212017 10:42 PM by pier4r.)
Post: #8




RE: Little explorations with the HP calculators
So I got to another problem and I'm stuck.
Quote:Brilliant.org Now, I know the closed formulas for the two summations, but I want to solve it with the calculator as much as I can. (one is "n(n+1)/2" the other is the square of the previous value, the more slightly complicated one is the summation of the term "n^2" but this is not the case ) I found out about the summation symbol (see hp50g AUR, almost at the end of the chapter 3. In short 'n' 1 2014 'n' <right shift, sin : for the summation>. Also proper flags have to be set) and I can compute the first sum to 2029105 . For the second sum, I can compute it too, but I end up with a floating point number (4.11726710102e12). This is further aggravated if I want to push a bit the summation of n^3 until, say 5000 (ending with 1.5631[...]e14), and so on. I remember that the hp50g is able to print out long numbers, I tried so search on internet a bit and I found no built in functions. I found a post mentioning the library longFloat (how much great work on for those little devices!) but before trying to use it I would like to ask here, where there are a lot of experienced people compared to me. Am I wrong when I remember that the hp50g can, by default, print out abitrary precision numbers? Wikis are great, Contribute :) 

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