I came across three forms of geometric series and all make sense with the exception of one: $\sum_{n=1}^{\infty}ar^{n+1}$
If the first term of the geometric series has to be a, how does n start at 1 and r is to the power of n+1?
I came across three forms of geometric series and all make sense with the exception of one: $\sum_{n=1}^{\infty}ar^{n+1}$
If the first term of the geometric series has to be a, how does n start at 1 and r is to the power of n+1?
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