/sci/ - Science & Math

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Anonymous Sun Oct 3 22:51:06 2010 No.1845235 [Reply] [Original]

Hello /sci/, I have a question. My teacher said that the Sn for a geometric (1 - r^(n+1))/(1-r), while my book says Sn = (a*(1-r)^n)/(1-r) where a is the starting value. Are these the same? Or am I confusing two different equations? Or is one of these wrong? Thank you /sci/

>>	Anonymous Sun Oct 3 22:54:06 2010 No.1845248 Sorry, it should read, "Sn for a geometric series = (1 - r^(n+1))/(1-r)"

>>	Anonymous Sun Oct 3 23:05:06 2010 No.1845293 bump

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