Aeneas
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If Un+1=Un + d defines an arithmetic progression, and Un+1 = kUn defines a geometric progression, is there a name for a progression defined by Un+1 =KUn + d? Thanks.
Names of sequence progressions.
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Hi Aeneas! 
We can rewrite that as Un+1 - d/(1 - K) =K(Un - d/(1 - k)) …
We can rewrite that as Un+1 - d/(1 - K) =K(Un - d/(1 - k)) …
geometric. 
Aeneas
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Many thanks tiny-tim!