Is this formula for a arithmetic sequence? #sum_(k=0)^(k=n-1)ar^k=a((1-r^n)/(1-r))#
1 Answer
Aug 13, 2016
The formula is for sum of a geometric sequence and not arithmetic sequence. See details below.
Explanation:
This formula is not about arithmetic sequence, but is for a geometric sequence.
Note that sequence starts from
Then changing
The right hand side gives the value of sum of the sequence for