Computing the Sum of an Infinite Geometric Series: Sum( 2*(1/3)^n, n = 3, 4, ...)

Computing the Sum of an Infinite Geometric Series: Sum( 2*(1/3)^n, n = 3, 4, ...)

[sciencewithali]

Thank you a lot ! I wonder why I had first to move to France to cross path with your Channel despite your significant dense and mervellous content

[Broxios]

In order to use the "common" text book formula for the sum of a geometric series you would have to shift the summation index, correct?