Talk:Arithmetico-geometric sequence

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Notability

I don't see that this is a notable topic. No mention in ZMATH for example: it seems to be a neologism for an elementary exercise, possibly set as homework? Not connected with Arithmetic–geometric mean by the way. Deltahedron (talk) 07:27, 19 November 2012 (UTC)[reply]

I found and added one reference for it, could be notable although not sure... Maschen (talk) 08:25, 20 November 2012 (UTC)[reply]

Equality?

In the derivation section ,this line bothers me: "Subtracting rS_n from S_n, dividing both sides by ,and using the technique of telescoping series (second equality) and the formula for the sum of a finite geometric series (fifth equality) gives..."

My question is- what are these mentions of second and fifth equality in the following?

Please clarify , and thanks in advance WorldDiagram837 (talk) 16:57, 16 April 2025 (UTC)[reply]