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How to implement the given series in WL?

Posted 8 years ago

Hi I'm trying to implement the series in Mathematica, but somehow it is not producing the required results. Could you please help me out?

enter image description here

This is the series, and i'm implementing it like:

For[i = 0, i <= 2, i++,
 Print[D[
\!\(\*UnderscriptBox[
OverscriptBox[\(\[Sum]\), \(k + 1\)], \(k = i\)]\)Subscript[a, 
     k] (D[s[\[Xi]], \[Xi]]/s[\[Xi]])^k],
  Print[];]]

I have added the source file as well, zain.nb

Regards

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POSTED BY: Muhammad Afzal

How about

Sum[Subscript[a, k] (D[s[\[Xi]], \[Xi]]/s[\[Xi]])^k, {k, 0, 2}]

You write a derivative D symbol that has no match in the formula you are trying to implement.

Two-dimensional traditional notations for sums and integrals are tricky. I use them only for final display, not for calculations.

POSTED BY: Gianluca Gorni
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