Does changing the summation index change the series?

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baby_1
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Hello
i want to know if we have a series with this equation
Summation from n = -infinity to +infinity of (a) raised to the power m minus n.


and change it to this form
Summation symbol with lower limit n = 1 and upper limit infinity, written as the sum from n = 1 to infinity.

the statement in Summation change or not?(
Small rendered expression (a) raised to the power m minus n, shown as a single term with a superscript exponent.


this changes it right?
Equation: sum from n = -infinity to +infinity of a, equals sum from n = -infinity to 0 of a, plus sum from 0 to +infinity of a, with summation index shown as n in the limits and term a.


where can i find the Summation notes?
 
(Assuming convergence) The first change makes no difference. The second change, you have n=0 twice.
 
Thanks mathman
could you tell me how can i improve myself Summation? where can i find the Summation tips?
 
Thanks mathman
i have another questions

you assume that series is:
Summation from m = 0 to t of (a/b)m - n, written as a LaTeX-rendered expression.


can i multiple (-) (t and 0) ?
Summation notation: the sum from m = 1 to infinity of the term t raised to the power minus m.

if yes what about argument (it changed?)?
 
what about this series ?

Infinite series sum from m=0 to infinity of (a/b)m - n, written with summation notation.


this changes is it right?
Summation from m = -infinity to 0 of (a/b)m - n, written as a sum over m with upper limit 0 and lower limit negative infinity.
 
I don't understand what you are trying to do. If you change the limits the summation index must be changed in a consistent manner.