Question

Calculus 2 students : do series always start at point i=0 ? or i=1 ?
and do sequences start at 0 too ? or 1 ?

Answer 1

Series generally start at i=0, but not always especially when it is the sum of a sequence at start at i=1.

Sequences usually start at i=1, but not always.

Sorry, but that's the best you're going to get.

Answer 2

yea, well thanks :D