Question

Infinite series

Answer 1

When the series\[\sum_{n}^{\infty}\]
starts with n being negative, do we still sum with an increasing n?

Answer 2

That wasn't capitalised, full-stopped or apostrophed.

Answer 3

yes, we still sum with increasing,

Answer 4

unless your upper limit is negative infinity, which i have never seen

Answer 5

it is redundant though, since you can just make your terms negative. so theres no point in having negative infinity .